{"id":17771,"date":"2024-07-01T11:57:49","date_gmt":"2024-07-01T03:57:49","guid":{"rendered":"https:\/\/www.casingtube.com\/?p=17771"},"modified":"2024-07-06T20:14:16","modified_gmt":"2024-07-06T12:14:16","slug":"standard-casing-sizes-casing-ppf-grades-and","status":"publish","type":"post","link":"https:\/\/www.casingtube.com\/ko\/standard-casing-sizes-casing-ppf-grades-and\/","title":{"rendered":"\ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30 \ucf00\uc774\uc2f1 Ppf \ub4f1\uae09 \ubc0f \uc911\ub7c9"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.casingtube.com\/ko\/standard-casing-sizes-casing-ppf-grades-and\/#%ED%91%9C%EC%A4%80_%EC%BC%80%EC%9D%B4%EC%8B%B1_%ED%81%AC%EA%B8%B0_%EC%9D%B4%ED%95%B4_%EC%A2%85%ED%95%A9_%EA%B0%80%EC%9D%B4%EB%93%9C\" title=\"\ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30 \uc774\ud574: \uc885\ud569 \uac00\uc774\ub4dc\">\ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30 \uc774\ud574: \uc885\ud569 \uac00\uc774\ub4dc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.casingtube.com\/ko\/standard-casing-sizes-casing-ppf-grades-and\/#%EC%BC%80%EC%9D%B4%EC%8B%B1_Ppf_%EB%93%B1%EA%B8%89_%EB%B0%8F_%EC%A4%91%EB%9F%89_%EC%82%B4%ED%8E%B4%EB%B3%B4%EA%B8%B0_%EC%95%8C%EC%95%84%EC%95%BC_%ED%95%A0_%EC%82%AC%ED%95%AD\" title=\"\ucf00\uc774\uc2f1 Ppf \ub4f1\uae09 \ubc0f \uc911\ub7c9 \uc0b4\ud3b4\ubcf4\uae30: \uc54c\uc544\uc57c \ud560 \uc0ac\ud56d\">\ucf00\uc774\uc2f1 Ppf \ub4f1\uae09 \ubc0f \uc911\ub7c9 \uc0b4\ud3b4\ubcf4\uae30: \uc54c\uc544\uc57c \ud560 \uc0ac\ud56d<\/a><\/li><\/ul><\/nav><\/div>\n<h1 id=\"understanding-standard-casing-sizes-a-comprehensive-guide-wpaicgheading\"><span class=\"ez-toc-section\" id=\"%ED%91%9C%EC%A4%80_%EC%BC%80%EC%9D%B4%EC%8B%B1_%ED%81%AC%EA%B8%B0_%EC%9D%B4%ED%95%B4_%EC%A2%85%ED%95%A9_%EA%B0%80%EC%9D%B4%EB%93%9C\"><\/span>\ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30 \uc774\ud574: \uc885\ud569 \uac00\uc774\ub4dc<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>\n\uc11d\uc720 \ubc0f \uac00\uc2a4 \uc0b0\uc5c5\uc758 \ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30\ub97c \uc774\ud574\ud558\ub294 \uac83\uc740 \ud604\uc7a5 \uc804\ubb38\uac00\uc5d0\uac8c \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc758 ppf(\ud53c\ud2b8\ub2f9 \ud30c\uc6b4\ub4dc) \ub4f1\uae09 \ubc0f \uc911\ub7c9\uacfc \ud568\uaed8 \uc774\ub7ec\ud55c \ud06c\uae30\ub294 \uc11d\uc720 \ubc0f \uac00\uc2a4\uc815\uc758 \uc131\uacf5\uc801\uc778 \uc2dc\ucd94 \ubc0f \uc644\uc131\uc5d0 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc774 \uae30\uc0ac\uc758 \ubaa9\uc801\uc740 \ucf00\uc774\uc2a4 \ub514\uc790\uc778\uc758 \uc774\ub7ec\ud55c \ud544\uc218 \uce21\uba74\uc5d0 \ub300\ud55c \ud3ec\uad04\uc801\uc778 \uac00\uc774\ub4dc\ub97c \uc81c\uacf5\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.casingtube.com\/wp-content\/uploads\/2022\/03\/TDIHOC0RPHI5880LX.jpg\" alt=\"alt-470\" class=\"wp-image-470\" id=\"i470\" \/><\/p>\n<p>\ub300\uad6c\uacbd \ud30c\uc774\ud504\uc778 \ucf00\uc774\uc2f1\uc744 \ub4dc\ub9b4\ub85c \ub6ab\uc740 \uad6c\uba4d\uc5d0 \uc0bd\uc785\ud558\uace0 \uc2dc\uba58\ud2b8\ub85c \uace0\uc815\ud558\uc5ec \uc6b0\ubb3c\uc744 \uc548\uc815\uc2dc\ud0b5\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc740 \uad6c\uba4d\uc774 \ubb34\ub108\uc9c0\ub294 \uac83\uc744 \ubc29\uc9c0\ud558\uace0, \uc554\uc11d\uacfc \uc9c0\ud558\uc218\uc758 \uc5ec\ub7ec \uce35\uc744 \ubd84\ub9ac\ud558\uace0, \uc11d\uc720\ub098 \uac00\uc2a4 \uc0dd\uc0b0\uc744 \uc704\ud55c \ub3c4\uad00\uc744 \uc81c\uacf5\ud558\ub294 \ub4f1 \ub2e4\uc591\ud55c \ubaa9\uc801\uc73c\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc758 \ud06c\uae30\ub294 \uc6b0\ubb3c\uc758 \uc9c1\uacbd\uc5d0 \ub530\ub77c \uacb0\uc815\ub418\uba70, \uc774\ub294 \uc6b0\ubb3c\uc758 \uae4a\uc774\uc640 \ucc9c\uacf5\ub418\ub294 \ud615\uc131 \uc720\ud615\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4.<\/p>\n<p>\ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30\ub294 \uc778\uce58\ub85c \uce21\uc815\ub418\uba70 \uc9c1\uacbd \ubc94\uc704\ub294 4.5\uc778\uce58\uc5d0\uc11c 20\uc778\uce58\uc785\ub2c8\ub2e4. \uac00\uc7a5 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \ud06c\uae30\ub294 7\uc778\uce58, 9 5\/8\uc778\uce58, 13 3\/8\uc778\uce58\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ucf00\uc774\uc2a4 \ud06c\uae30\uc758 \uc120\ud0dd\uc740 \uc784\uc758\uc801\uc774\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc720\uc815\uc758 \uc694\uad6c \uc0ac\ud56d, \uc2dc\ucd94 \uc7a5\ube44\uc758 \uc131\ub2a5, \uae4a\uc774\uc5d0\uc11c \uc608\uc0c1\ub418\ub294 \uc555\ub825 \ubc0f \uc628\ub3c4\ub97c \uae30\uc900\uc73c\ub85c \uc2e0\uc911\ud558\uac8c \uc120\ud0dd\ub429\ub2c8\ub2e4.<\/p>\n<p>\ucf00\uc774\uc2f1 \ud30c\uc774\ud504, \ucf00\uc774\uc2f1 \uc6b0\ubb3c \ud30c\uc774\ud504, \ucf00\uc774\uc2f1 \ucd5c\uace0 \ud30c\uc774\ud504, \ucf00\uc774\uc2f1 \ub300 \uce90\ub9ac\uc5b4 \ud30c\uc774\ud504, AC \ud30c\uc774\ud504 \ucf00\uc774\uc2f1, \ucf00\uc774\uc2f1 \uac15\uad00, \ucf00\uc774\uc2f1 \ud30c\uc774\ud504 \ud06c\uae30, \ucf00\uc774\uc2f1 PVC \ud30c\uc774\ud504 \uac00\uaca9, \ucf00\uc774\uc2f1 \ud30c\uc774\ud504, \uc911\uad6d \ucf00\uc774\uc2f1 \ud30c\uc774\ud504 \uacf5\uae09 \uc5c5\uccb4, \ucf00\uc774\uc2f1 \ucea1\ud551 \ud30c\uc774\ud504, \ucf00\uc774\uc2f1 \ub4dc\ub9b4 \ud30c\uc774\ud504, \uce90\ub9ac\uc5b4 \ud30c\uc774\ud504, \ucf00\uc774\uc2f1 \ud30c\uc774\ud504 \ud06c\uae30, \ubd80\uc2f1 \ud50c\ub79c\uc9c0, \ubd80\uc2f1 \uc2ac\ub9ac\ube0c, \ubd80\uc2f1, \ubd80\uc2f1 \uc554, \ubd80\uc2f1 \ubca0\uc5b4\ub9c1, \ubd80\uc2f1 \uac10\uc18d\uae30, \ubd80\uc2f1 \ub3c4\uad6c, \ubd80\uc2f1 PVC, \ubd80\uc2f1 \uc758\ubbf8<\/p>\n<p>\ucf00\uc774\uc2f1 ppf \ub4f1\uae09\uc73c\ub85c \ub118\uc5b4\uac00\uc11c, ppf\ub294 \ucf00\uc774\uc2f1 \ubb34\uac8c\uc758 \ucc99\ub3c4\uc778 \ud53c\ud2b8\ub2f9 \ud30c\uc6b4\ub4dc\ub97c \uc758\ubbf8\ud55c\ub2e4\ub294 \uc810\uc5d0 \uc720\uc758\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. ppf \ub4f1\uae09\uc740 \ucf00\uc774\uc2f1\uc758 \uac15\ub3c4\uc640 \ub0b4\uad6c\uc131\uc5d0 \uc9c1\uc811\uc801\uc778 \uc601\ud5a5\uc744 \ubbf8\uce58\uae30 \ub54c\ubb38\uc5d0 \ucf00\uc774\uc2f1 \uc124\uacc4\uc5d0 \uc788\uc5b4 \uc911\uc694\ud55c \uc694\uc18c\uc785\ub2c8\ub2e4. ppf \ub4f1\uae09\uc774 \ub192\uc744\uc218\ub85d \ucf00\uc774\uc2a4\uac00 \ub354 \ubb34\uac81\uace0 \ud2bc\ud2bc\ud574\uc9d1\ub2c8\ub2e4. \ud45c\uc900 \ucf00\uc774\uc2f1 ppf \ub4f1\uae09 \ubc94\uc704\ub294 9.5 ppf ~ 72.0 ppf\uc785\ub2c8\ub2e4. \uc801\uc808\ud55c ppf \ub4f1\uae09\uc758 \uc120\ud0dd\uc740 \uc720\uc815\uc758 \uae4a\uc774, \uc555\ub825, \uc628\ub3c4 \uc870\uac74\uc740 \ubb3c\ub860 \uc0ac\uc6a9\ub41c \uad74\ucc29 \uc720\uccb4\uc758 \uc720\ud615\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4.<\/p>\n<p>\ucf00\uc774\uc2f1\uc758 \ubb34\uac8c\ub294 \uc720\uc815 \uc124\uacc4\uc758 \ub610 \ub2e4\ub978 \uc911\uc694\ud55c \uc694\uc18c\uc785\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ud30c\uc6b4\ub4dc \ub2e8\uc704\ub85c \uce21\uc815\ub418\uba70 \ucf00\uc774\uc2f1\uc758 \uc9c1\uacbd \ubc0f \ubcbd \ub450\uaed8\uc640 \uc9c1\uc811\uc801\uc778 \uad00\ub828\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc758 \ubb34\uac8c\ub294 \uc720\uc815\uc758 \uc548\uc815\uc131\uacfc \uace0\uc555 \ubc0f \uc628\ub3c4\ub97c \uacac\ub51c \uc218 \uc788\ub294 \ub2a5\ub825\uc5d0 \ud070 \uc601\ud5a5\uc744 \ubbf8\uce60 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc720\uc815\uc758 \ud2b9\uc815 \uc870\uac74\uc5d0 \uc801\ud569\ud55c \ucf00\uc774\uc2f1 \uc911\ub7c9\uc758 \uc120\ud0dd\uc774 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n<div class=\"entry-content-asset videofit\"><iframe loading=\"lazy\" title=\"K55 API 5CT Casing,K55 API 5CT Tubing,made in China,API 5CT Coupling Casing and Tubing\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/baEvl6cvj0c?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>\ucf00\uc774\uc2f1 \ud30c\uc774\ud504 \ub3c4\ub9e4\uac00 \uace0\ud488\uc9c8 \uc0c1\ud488 \uc911\uad6d \uacb0\ub860\uc801\uc73c\ub85c, \uc11d\uc720 \ubc0f \uac00\uc2a4 \uc0b0\uc5c5 \uc804\ubb38\uac00\uc5d0\uac8c\ub294 \ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30, ppf \ub4f1\uae09 \ubc0f \uc911\ub7c9\uc744 \uc774\ud574\ud558\ub294 \uac83\uc774 \uae30\ubcf8\uc785\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc694\uc18c\ub294 \uc11d\uc720 \ubc0f \uac00\uc2a4\uc815\uc758 \uc131\uacf5\uc801\uc778 \uc2dc\ucd94 \ubc0f \uc644\ub8cc\ub97c \ubcf4\uc7a5\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc774\ub294 \uc720\uc815\uc758 \uc548\uc815\uc131, \ub2e4\uc591\ud55c \uc554\uc11d\uce35\uc758 \ubd84\ub9ac, \uc11d\uc720 \ub610\ub294 \uac00\uc2a4 \uc0dd\uc0b0\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc801\uc808\ud55c \ucf00\uc774\uc2f1 \ud06c\uae30, ppf \ub4f1\uae09 \ubc0f \uc911\ub7c9\uc744 \uc120\ud0dd\ud558\ub824\uba74 \uc720\uc815\uc758 \uc694\uad6c \uc0ac\ud56d, \uc2dc\ucd94 \uc7a5\ube44\uc758 \uc131\ub2a5, \uae4a\uc774\uc5d0\uc11c \uc608\uc0c1\ub418\ub294 \uc555\ub825 \ubc0f \uc628\ub3c4\uc5d0 \ub300\ud55c \ucca0\uc800\ud55c \uc774\ud574\ub97c \ubc14\ud0d5\uc73c\ub85c \ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<h1 id=\"exploring-casing-ppf-grades-and-weights-what-you-need-to-know-wpaicgheading\"><span class=\"ez-toc-section\" id=\"%EC%BC%80%EC%9D%B4%EC%8B%B1_Ppf_%EB%93%B1%EA%B8%89_%EB%B0%8F_%EC%A4%91%EB%9F%89_%EC%82%B4%ED%8E%B4%EB%B3%B4%EA%B8%B0_%EC%95%8C%EC%95%84%EC%95%BC_%ED%95%A0_%EC%82%AC%ED%95%AD\"><\/span>\ucf00\uc774\uc2f1 Ppf \ub4f1\uae09 \ubc0f \uc911\ub7c9 \uc0b4\ud3b4\ubcf4\uae30: \uc54c\uc544\uc57c \ud560 \uc0ac\ud56d<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>\n\uc11d\uc720 \ubc0f \uac00\uc2a4 \uc0b0\uc5c5\uc5d0\uc11c \ucf00\uc774\uc2f1\uc740 \uc131\uacf5\uc801\uc778 \uc2dc\ucd94 \ubc0f \uc720\uc815 \uc644\uc131\uc744 \ubcf4\uc7a5\ud558\ub294 \ub370 \uc911\ucd94\uc801\uc778 \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc740 \uc720\uc815 \ubc0f \uac00\uc2a4\uc815 \ubcbd\uc758 \uad6c\uc870\uc801 \ub9ac\ud14c\uc774\ub108 \uc5ed\ud560\uc744 \ud558\ub294 \ub300\uad6c\uacbd \ud30c\uc774\ud504\ub85c, \uce35\ubcc4\ub85c \uc124\uce58\ub418\uba70 \uac01 \uce35\uc774 \uc811\ud569\ub418\uc5b4 \uc548\uc815\uc131\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \ucf00\uc774\uc2a4\uc758 \ud06c\uae30, \ubb34\uac8c, \ub4f1\uae09\uc740 \ud6a8\uc728\uc131\uacfc \ub0b4\uad6c\uc131\uc744 \uacb0\uc815\ud558\ub294 \uc911\uc694\ud55c \uc694\uc18c\uc785\ub2c8\ub2e4. \uc774 \ubb38\uc11c\uc758 \ubaa9\uc801\uc740 \ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30, \ucf00\uc774\uc2f1 ppf(\ud53c\ud2b8\ub2f9 \ud30c\uc6b4\ub4dc) \ub4f1\uae09 \ubc0f \uc911\ub7c9\uc5d0 \ub300\ud55c \uc2ec\uce35\uc801\uc778 \uc774\ud574\ub97c \uc81c\uacf5\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<p>\ud45c\uc900 \ucf00\uc774\uc2f1 \ud06c\uae30\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \uc778\uce58 \ub2e8\uc704\ub85c \uce21\uc815\ub418\uba70 \uc9c1\uacbd\uc740 4.5\uc778\uce58\uc5d0\uc11c 20\uc778\uce58 \uc0ac\uc774\uc785\ub2c8\ub2e4. \ucf00\uc774\uc2f1\uc758 \ud06c\uae30\ub294 \ub6ab\uc740 \uad6c\uba4d\uc758 \ud06c\uae30, \uc555\ub825 \u200b\u200b\ubc0f \uc628\ub3c4 \uc870\uac74, \uc608\uc0c1 \uc0dd\uc0b0 \uc18d\ub3c4\uc5d0 \ub530\ub77c \uc120\ud0dd\ub429\ub2c8\ub2e4. \uac00\uc7a5 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \ucf00\uc774\uc2f1 \ud06c\uae30\ub294 7\uc778\uce58\uc640 9 5\/8\uc778\uce58\uc774\uba70 \ub300\ubd80\ubd84\uc758 \ub4dc\ub9b4\ub9c1 \uc870\uac74\uc5d0 \uc801\ud569\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uace0\uc555, \uace0\uc628 \uc720\uc815 \ub610\ub294 \uc0dd\uc0b0 \uc18d\ub3c4\uac00 \ub192\uc740 \uc720\uc815\uc758 \uacbd\uc6b0 \ub354 \ud070 \ucf00\uc774\uc2f1 \ud06c\uae30\uac00 \ud544\uc694\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.casingtube.com\/wp-content\/uploads\/2022\/03\/20150706111039_73149.jpg\" alt=\"alt-4713\" class=\"wp-image-4713\" id=\"i4713\" \/><\/p>\n<p>\n\ucf00\uc774\uc2f1 ppf \ub4f1\uae09\uc740 \ud53c\ud2b8\ub2f9 \ucf00\uc774\uc2f1\uc758 \ubb34\uac8c\ub97c \ub098\ud0c0\ub0b4\uba70, \ucf00\uc774\uc2f1 \uc124\uacc4\uc5d0 \uc788\uc5b4\uc11c \ud544\uc218\uc801\uc778 \ub9e4\uac1c\ubcc0\uc218\uc785\ub2c8\ub2e4. ppf \ub4f1\uae09\uc740 \ubcbd \ub450\uaed8\uc640 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