{"id":16889,"date":"2026-11-13T15:32:35","date_gmt":"2026-11-13T07:32:35","guid":{"rendered":"https:\/\/www.kingpdc.com\/?p=16889"},"modified":"2026-11-13T15:32:37","modified_gmt":"2026-11-13T07:32:37","slug":"qu-est-ce-qu-un-taillant-pdc-de-la-structure-en-feuille-composite-a-la-rupture-par-cisaillement","status":"publish","type":"post","link":"https:\/\/www.kingpdc.com\/fr\/qu-est-ce-qu-un-taillant-pdc-de-la-structure-en-feuille-composite-a-la-rupture-par-cisaillement\/","title":{"rendered":"Qu'est-ce qu'un taillant PDC ? De la structure en feuille composite \u00e0 la rupture par cisaillement"},"content":{"rendered":"

Le taillant PDC est un composant de coupe directe de la roche sur un tr\u00e9pan \u00e0 taillants fixes. Il se compose d'une couche de diamant polycristallin et d'un substrat en carbure de tungst\u00e8ne c\u00e9ment\u00e9. Le tranchant de la couche de diamant p\u00e9n\u00e8tre dans la roche, et le substrat soutient le tranchant \u00e0 l'arri\u00e8re. PDC est l'abr\u00e9viation de polycrystalline diamond compact, souvent appel\u00e9 en chinois \u00ab compacts de diamant polycristallin \u00bb. Le taillant PDC sur le dessin anglais fait r\u00e9f\u00e9rence \u00e0 une dent de coupe individuelle, et le tr\u00e9pan PDC fait r\u00e9f\u00e9rence au tr\u00e9pan entier \u00e9quip\u00e9 de ces dents de coupe.<\/p>\n\n\n\n

\"Taillant<\/figure>\n\n\n\n

La couche de diamant forme le tranchant, et le substrat en carbure assure le soutien<\/h2>\n\n\n\n

Prenons l'exemple d'une dent plate cylindrique courante. Une extr\u00e9mit\u00e9 du cylindre est une couche de diamant polycristallin (table de diamant), sa face d'extr\u00e9mit\u00e9 ext\u00e9rieure est la surface de coupe, et l'ar\u00eate de travail est situ\u00e9e sur le bord ext\u00e9rieur de la surface de coupe. Le cylindre arri\u00e8re est une matrice en carbure c\u00e9ment\u00e9 (substrat). Lors de la fabrication, les particules de diamant sont fritt\u00e9es en une couche polycristalline sous haute temp\u00e9rature et haute pression, et combin\u00e9es au substrat. L'\u00e9paisseur de la couche de diamant indiqu\u00e9e sur le profil du produit est la couche d'extr\u00e9mit\u00e9.<\/p>\n\n\n\n

La charge exerc\u00e9e par la roche sur le tranchant est transmise \u00e0 la lame du tr\u00e9pan \u00e0 travers la couche de diamant et le substrat. Le soutien du substrat affectera les performances de la couche de diamant sous contrainte. En prenant la Figure 6 du brevet de tr\u00e9pan 1 comme exemple, dans certaines conditions de coupe, la matrice derri\u00e8re le bord s'use en formant un creux, affaiblissant le soutien de la couche de diamant et augmentant le risque de fissuration ou d'\u00e9caillage. Lors de l'examen du profil de la dent de coupe, il convient \u00e9galement de pr\u00eater attention \u00e0 la quantit\u00e9 de soutien de la matrice derri\u00e8re le tranchant.<\/p>\n\n\n\n

La dent de coupe est fix\u00e9e sur la lame et cisaillle la roche avec la rotation du tr\u00e9pan.<\/h2>\n\n\n\n

En prenant l'exemple de la dent plate install\u00e9e par brasage, le corps de base est install\u00e9 dans l'alv\u00e9ole de la lame, la surface de coupe en diamant fait face \u00e0 la direction de la roche arrivante, et le tranchant de travail est expos\u00e9 \u00e0 l'ext\u00e9rieur de la lame. Il y a deux liaisons ici. La couche de diamant et le corps de base sont li\u00e9s par frittage lors de la fabrication de la dent, et le corps de base et l'alv\u00e9ole sont fix\u00e9s par brasage lors de l'assemblage du tr\u00e9pan. La premi\u00e8re relie les deux mat\u00e9riaux en 1 dent de coupe, et la seconde fixe la dent de coupe sur la lame.<\/p>\n\n\n\n

Le poids sur l'outil presse le tranchant contre la face rocheuse, et le tr\u00e9pan tourne pour balayer la roche lat\u00e9ralement avec les dents de coupe fix\u00e9es \u00e0 la lame. La 1 fine couche de roche devant le tranchant se s\u00e9pare sous l'action du cisaillement et glisse le long de la surface de coupe, laissant une marque de coupe derri\u00e8re la dent. Selon la Figure 6 du brevet, le tranchant p\u00e9n\u00e9trant dans la roche peut \u00eatre trouv\u00e9 \u00e0 partir du bord ext\u00e9rieur de la face de coupe, puis la direction de sortie des d\u00e9bris peut \u00eatre observ\u00e9e le long de la face de coupe.<\/p>\n\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

PDC cutter is a fixed cutter bit on the direct cutting of rock components. It consists of a polycrystalline diamond layer and a tungsten carbide cemented carbide substrate. The cutting edge of the diamond layer cuts into the rock, and the substrate supports the cutting edge at the rear. PDC is the abbreviation of polycrystalline […]<\/p>","protected":false},"author":4,"featured_media":16890,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false,"footnotes":""},"categories":[40],"tags":[],"class_list":["post-16889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"metadata":{"_edit_lock":["1794555214:4"],"rank_math_seo_score":["9"],"_thumbnail_id":["16890"],"_edit_last":["4"],"_ez-toc-disabled":[""],"_ez-toc-insert":[""],"_ez-toc-header-label":[""],"_ez-toc-device-target":[""],"_ez-toc-alignment":["none"],"_ez-toc-heading-levels":["a:0:{}"],"_ez-toc-alttext":[""],"_ez-toc-visibility_hide_by_default":[""],"_ez-toc-hide_counter":[""],"_ez-toc-exclude":[""],"_ez-toc-word_count_limit":["0"],"_ez-toc-position-specific":[""],"product_title":[""],"_product_title":["field_696d9344f3abf"],"product_description":[""],"_product_description":["field_696da3b2d265a"],"product_parametertitle":[""],"_product_parametertitle":["field_696da3d1d265b"],"product_parameter1":[""],"_product_parameter1":["field_696da3ded265c"],"product_parameter2":[""],"_product_parameter2":["field_696da3eed265d"],"product_parameter3":[""],"_product_parameter3":["field_696da3f2d265e"],"product_parameter4":[""],"_product_parameter4":["field_698bf210e1156"],"product_parameter5":[""],"_product_parameter5":["field_698bf214e1157"],"product_parameter6":[""],"_product_parameter6":["field_698bf217e1158"],"product_parameter7":[""],"_product_parameter7":["field_698bf21ae1159"],"product_parameter8":[""],"_product_parameter8":["field_698bf21fe115a"],"product_parameter9":[""],"_product_parameter9":["field_698bf223e115b"],"parameter_describ":[""],"_parameter_describ":["field_698bf251e1161"],"product_parameter_description1":[""],"_product_parameter_description1":["field_696da3f6d265f"],"product_parameter_description2":[""],"_product_parameter_description2":["field_696da404d2660"],"product_parameter_description3":[""],"_product_parameter_description3":["field_696da407d2661"],"product_parameter_description4":[""],"_product_parameter_description4":["field_698bf22ce115c"],"product_parameter_description5":[""],"_product_parameter_description5":["field_698bf234e115d"],"product_parameter_description6":[""],"_product_parameter_description6":["field_698bf238e115e"],"product_parameter_description7":[""],"_product_parameter_description7":["field_698bf23be115f"],"product_parameter_description8":[""],"_product_parameter_description8":["field_699e8b3f14c93"],"product_parameter_description9":[""],"_product_parameter_description9":["field_698bf23ee1160"],"characteristics_tittle":[""],"_characteristics_tittle":["field_696da36dd2659"],"characteristics_tittle1":[""],"_characteristics_tittle1":["field_696dbd2b33a74"],"characteristics_tittle2":[""],"_characteristics_tittle2":["field_696dbd3e33a75"],"characteristics_tittle3":[""],"_characteristics_tittle3":["field_696dbd4233a76"],"characteristics_tittle4":[""],"_characteristics_tittle4":["field_696f2adec2f9f"],"characteristics_tittle5":[""],"_characteristics_tittle5":["field_696dbd5f33a77"],"characteristics_tittle6":[""],"_characteristics_tittle6":["field_696dbd6533a78"],"detailed_specifications_table":[""],"_detailed_specifications_table":["field_696de96e3b662"],"characteristics_description1":[""],"_characteristics_description1":["field_696dbd6b33a79"],"characteristics_description2":[""],"_characteristics_description2":["field_696dbde158b66"],"characteristics_description3":[""],"_characteristics_description3":["field_696dbdec58b67"],"characteristics_description4":[""],"_characteristics_description4":["field_696dbdf058b68"],"characteristics_description5":[""],"_characteristics_description5":["field_696dbdf558b69"],"characteristics_description6":[""],"_characteristics_description6":["field_696dbdfc58b6a"],"comparison_points_tittle":[""],"_comparison_points_tittle":["field_696dbdff58b6b"],"comparison_points_description":[""],"_comparison_points_description":["field_696dbe2858b6c"],"comparison_points_tittle1":[""],"_comparison_points_tittle1":["field_696dbe3958b6d"],"comparison_points_tittle2":[""],"_comparison_points_tittle2":["field_696dbe5b58b6e"],"comparison_points_tittle3":[""],"_comparison_points_tittle3":["field_696dbe6058b6f"],"comparison_points_description1":[""],"_comparison_points_description1":["field_696dbe6d58b70"],"comparison_points_description2":[""],"_comparison_points_description2":["field_696dbe7d58b71"],"comparison_points_description3":[""],"_comparison_points_description3":["field_696dbe8058b72"],"application_title":[""],"_application_title":["field_696da5cd86855"],"application_title1":[""],"_application_title1":["field_696da6f986856"],"application_title2":[""],"_application_title2":["field_696da70086857"],"application_title3":[""],"_application_title3":["field_696da70486858"],"application_title4":[""],"_application_title4":["field_696da70886859"],"application_describe1":[""],"_application_describe1":["field_696da70d8685a"],"application_describe2":[""],"_application_describe2":["field_696da7198685b"],"application_describe3":[""],"_application_describe3":["field_696da71e8685c"],"application_describe4":[""],"_application_describe4":["field_696da7228685d"],"instruction_title":[""],"_instruction_title":["field_696da7278685e"],"instruction_title1":[""],"_instruction_title1":["field_696da73b8685f"],"instruction_title2":[""],"_instruction_title2":["field_696da74986860"],"instruction_title3":[""],"_instruction_title3":["field_696da74e86861"],"instruction_title4":[""],"_instruction_title4":["field_696da75186862"],"instruction_describe1":[""],"_instruction_describe1":["field_696da75586863"],"instruction_describe2":[""],"_instruction_describe2":["field_696da75f86864"],"instruction_describe3":[""],"_instruction_describe3":["field_696da76386865"],"instruction_describe4":[""],"_instruction_describe4":["field_696da76886866"],"material":[""],"_material":["field_696eef6e00efb"],"material_description":[""],"_material_description":["field_696eef7800efc"],"pre_and_post_sales_titles":[""],"_pre_and_post_sales_titles":["field_696eef8000efd"],"after_sales_service_title":[""],"_after_sales_service_title":["field_696eef8800efe"],"before_sales_service_title":[""],"_before_sales_service_title":["field_696eef8f00eff"],"after_sales_service_describe":[""],"_after_sales_service_describe":["field_696eef9600f00"],"before_sales_service_describe":[""],"_before_sales_service_describe":["field_696eef9d00f01"],"faq_question1":[""],"_faq_question1":["field_696de4ef8fe46"],"faq_question2":[""],"_faq_question2":["field_696de4f78fe47"],"faq_question3":[""],"_faq_question3":["field_696de4fb8fe48"],"faq_question4":[""],"_faq_question4":["field_696de4ff8fe49"],"faq_question5":[""],"_faq_question5":["field_696de5028fe4a"],"faq_question6":[""],"_faq_question6":["field_696de5068fe4b"],"faq_answer1":[""],"_faq_answer1":["field_696de5098fe4c"],"faq_answer2":[""],"_faq_answer2":["field_696de5108fe4d"],"faq_answer3":[""],"_faq_answer3":["field_696de5148fe4e"],"faq_answer4":[""],"_faq_answer4":["field_696de5178fe4f"],"faq_answer5":[""],"_faq_answer5":["field_696de51b8fe50"],"faq_answer6":[""],"_faq_answer6":["field_696de5218fe51"],"aggregated_titles":[""],"_aggregated_titles":["field_698ad8fabfec6"],"aggregate_description":[""],"_aggregate_description":["field_698ad913bfec7"],"polymer_product_sku1":[""],"_polymer_product_sku1":["field_698ad932bfec8"],"polymer_product_sku2":[""],"_polymer_product_sku2":["field_698ad93dbfec9"],"polymer_product_sku3":[""],"_polymer_product_sku3":["field_698ad941bfeca"],"polymer_product_sku4":[""],"_polymer_product_sku4":["field_69b2941681492"],"polymer_product_sku5":[""],"_polymer_product_sku5":["field_69b2941a81493"],"polymer_product_sku6":[""],"_polymer_product_sku6":["field_69b2941e81494"],"polymer_product_sku7":[""],"_polymer_product_sku7":["field_69b3d324b1d9b"],"polymer_product_sku8":[""],"_polymer_product_sku8":["field_69b3d32cb1d9c"],"polymer_product_sku9":[""],"_polymer_product_sku9":["field_69b3d32fb1d9d"],"polymer_product_sku10":[""],"_polymer_product_sku10":["field_69b3d332b1d9e"],"polymer_product_sku11":[""],"_polymer_product_sku11":["field_69b3d336b1d9f"],"aggregated_product_titles1":[""],"_aggregated_product_titles1":["field_698ad945bfecb"],"aggregated_product_titles2":[""],"_aggregated_product_titles2":["field_698ad94dbfecc"],"aggregated_product_titles3":[""],"_aggregated_product_titles3":["field_698ad954bfecd"],"aggregated_product_titles4":[""],"_aggregated_product_titles4":["field_69b2942881495"],"aggregated_product_titles5":[""],"_aggregated_product_titles5":["field_69b2942c81496"],"aggregated_product_titles6":[""],"_aggregated_product_titles6":["field_69b2942f81497"],"aggregated_product_titles7":[""],"_aggregated_product_titles7":["field_69b3d2d7b1d90"],"aggregated_product_titles8":[""],"_aggregated_product_titles8":["field_69b3d2dbb1d91"],"aggregated_product_titles9":[""],"_aggregated_product_titles9":["field_69b3d2deb1d92"],"aggregated_product_titles10":[""],"_aggregated_product_titles10":["field_69b3d2e4b1d93"],"aggregated_product_titles11":[""],"_aggregated_product_titles11":["field_69b3d2eab1d94"],"aggregated_product_description1":[""],"_aggregated_product_description1":["field_698ad957bfece"],"aggregated_product_description2":[""],"_aggregated_product_description2":["field_698ad961bfecf"],"aggregated_product_description3":[""],"_aggregated_product_description3":["field_698ad965bfed0"],"aggregated_product_description4":[""],"_aggregated_product_description4":["field_69b2944081498"],"aggregated_product_description5":[""],"_aggregated_product_description5":["field_69b2944481499"],"aggregated_product_description6":[""],"_aggregated_product_description6":["field_69b294488149a"],"aggregated_product_description7":[""],"_aggregated_product_description7":["field_69b3d2f4b1d95"],"aggregated_product_description8":[""],"_aggregated_product_description8":["field_69b3d2f8b1d96"],"aggregated_product_description9":[""],"_aggregated_product_description9":["field_69b3d2feb1d97"],"aggregated_product_description10":[""],"_aggregated_product_description10":["field_69b3d301b1d98"],"aggregated_product_description11":[""],"_aggregated_product_description11":["field_69b3d305b1d99"],"polymerization_characteristics_tittle":[""],"_polymerization_characteristics_tittle":["field_699d3c712ad62"],"polymerization_characteristics1":[""],"_polymerization_characteristics1":["field_699d3c742ad63"],"polymerization_characteristics2":[""],"_polymerization_characteristics2":["field_699d3c7d2ad64"],"polymerization_characteristics3":[""],"_polymerization_characteristics3":["field_699d3c802ad65"],"polymerization_characteristics4":[""],"_polymerization_characteristics4":["field_699d3c842ad66"],"polymerization_characteristics5":[""],"_polymerization_characteristics5":["field_699d3c8d2ad67"],"polymerization_characteristics6":[""],"_polymerization_characteristics6":["field_699d3c902ad68"],"polymerization_characteristics_descr1":[""],"_polymerization_characteristics_descr1":["field_699d3c9a2ad69"],"polymerization_characteristics_descr2":[""],"_polymerization_characteristics_descr2":["field_699d3c9c2ad6a"],"polymerization_characteristics_descr3":[""],"_polymerization_characteristics_descr3":["field_699d3c9f2ad6b"],"polymerization_characteristics_descr4":[""],"_polymerization_characteristics_descr4":["field_699d3ca22ad6c"],"polymerization_characteristics_descr5":[""],"_polymerization_characteristics_descr5":["field_699d3ca52ad6d"],"polymerization_characteristics_descr6":[""],"_polymerization_characteristics_descr6":["field_699d3ca92ad6e"],"aggregated_application_scenarios_tittle":[""],"_aggregated_application_scenarios_tittle":["field_699d3cae2ad6f"],"aggregated_application_scenarios1":[""],"_aggregated_application_scenarios1":["field_699d3cbd2ad70"],"aggregated_application_scenarios2":[""],"_aggregated_application_scenarios2":["field_699d3cc52ad71"],"aggregated_application_scenarios3":[""],"_aggregated_application_scenarios3":["field_699d3cc92ad72"],"aggregated_application_scenarios4":[""],"_aggregated_application_scenarios4":["field_699d3ccc2ad73"],"aggregated_application_scenarios5":[""],"_aggregated_application_scenarios5":["field_699d3cd02ad74"],"aggregated_application_scenarios6":[""],"_aggregated_application_scenarios6":["field_699d3cd42ad75"],"aggregated_application_scenarios7":[""],"_aggregated_application_scenarios7":["field_69c0d8cb5afd4"],"aggregated_application_scenarios8":[""],"_aggregated_application_scenarios8":["field_69c0d8cf5afd5"],"aggregated_application_scenarios9":[""],"_aggregated_application_scenarios9":["field_69c0d8d25afd6"],"aggregated_application_scenarios10":[""],"_aggregated_application_scenarios10":["field_69c0d8d65afd7"],"aggregated_tdk_descption":[""],"_aggregated_tdk_descption":["field_69b3a22178d86"],"aggregated_url":[""],"_aggregated_url":["field_69b3c269f88ab"],"aggregated_tdk_decption":[""],"_aggregated_tdk_decption":["field_69b3c279f88ac"],"aggregated_product_link1":[""],"_aggregated_product_link1":["field_69bb8958a804d"],"aggregated_product_link2":[""],"_aggregated_product_link2":["field_69bba5b2fb5a4"],"aggregated_product_link3":[""],"_aggregated_product_link3":["field_69bba5b7fb5a5"],"aggregated_product_link4":[""],"_aggregated_product_link4":["field_69bba5c1fb5a6"],"aggregated_product_link5":[""],"_aggregated_product_link5":["field_69bba5c5fb5a7"],"aggregated_product_link6":[""],"_aggregated_product_link6":["field_69bba5c9fb5a8"],"aggregated_product_link7":[""],"_aggregated_product_link7":["field_69bba5cffb5a9"],"aggregated_product_link8":[""],"_aggregated_product_link8":["field_69bba5d5fb5aa"],"aggregated_product_link9":[""],"_aggregated_product_link9":["field_69bba5d8fb5ab"],"aggregated_product_link10":[""],"_aggregated_product_link10":["field_69bba5dbfb5ac"],"aggregated_product_link11":[""],"_aggregated_product_link11":["field_69bba5defb5ad"],"aggregated_prods1_imgurl":[""],"_aggregated_prods1_imgurl":["field_69bba5e1fb5ae"],"aggregated_prods2_imgurl":[""],"_aggregated_prods2_imgurl":["field_69bba603fb5af"],"aggregated_prods3_imgurl":[""],"_aggregated_prods3_imgurl":["field_69bba608fb5b0"],"aggregated_prods4_imgurl":[""],"_aggregated_prods4_imgurl":["field_69bba60dfb5b1"],"aggregated_prods5_imgurl":[""],"_aggregated_prods5_imgurl":["field_69bba612fb5b2"],"aggregated_prods6_imgurl":[""],"_aggregated_prods6_imgurl":["field_69bba617fb5b3"],"aggregated_prods7_imgurl":[""],"_aggregated_prods7_imgurl":["field_69bba61ffb5b4"],"aggregated_prods8_imgurl":[""],"_aggregated_prods8_imgurl":["field_69bba625fb5b5"],"aggregated_prods9_imgurl":[""],"_aggregated_prods9_imgurl":["field_69bba62afb5b6"],"aggregated_prods10_imgurl":[""],"_aggregated_prods10_imgurl":["field_69bba630fb5b7"],"aggregated_prods11_imgurl":[""],"_aggregated_prods11_imgurl":["field_69bba634fb5b8"],"themepark_seo_title":["What Is A Pdc Cutter? Structure And Rock Shearing"],"themepark_seo_description":["Learn How A Pdc Cutter\u2019S Diamond Layer And Tungsten Carbide Substrate Work Together, How The Cutter Mounts On A Drill Bit, And How Its Edge Shears Rock."],"themepark_seo_keyword":["What Is a Pdc Cutter\u200b"],"catce":["sidebar-widgets4"],"views":["40"]},"acf":[],"medium_url":"https:\/\/www.kingpdc.com\/wp-content\/uploads\/2026\/11\/pasted-image-20261113-072616-870.png","thumbnail_url":"https:\/\/www.kingpdc.com\/wp-content\/uploads\/2026\/11\/pasted-image-20261113-072616-458.png","full_url":"https:\/\/www.kingpdc.com\/wp-content\/uploads\/2026\/11\/pasted-image-20261113-072613-677.png","_links":{"self":[{"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/posts\/16889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/comments?post=16889"}],"version-history":[{"count":1,"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/posts\/16889\/revisions"}],"predecessor-version":[{"id":16891,"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/posts\/16889\/revisions\/16891"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/media\/16890"}],"wp:attachment":[{"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/media?parent=16889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/categories?post=16889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kingpdc.com\/fr\/wp-json\/wp\/v2\/tags?post=16889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}