[{"title":"( 9 个子文件 923KB ) SDH原理详细介绍(业内最完整)","children":[{"title":"SDH","children":[{"title":"第三章.PDF <span style='color:#111;'> 164.47KB </span>","children":null,"spread":false},{"title":"第八章.PDF <span style='color:#111;'> 85.73KB </span>","children":null,"spread":false},{"title":"第六章.PDF <span style='color:#111;'> 79.85KB </span>","children":null,"spread":false},{"title":"第二章.PDF <span style='color:#111;'> 178.22KB </span>","children":null,"spread":false},{"title":"封面.PDF <span style='color:#111;'> 30.43KB </span>","children":null,"spread":false},{"title":"第四章.PDF <span style='color:#111;'> 162.27KB </span>","children":null,"spread":false},{"title":"第五章.PDF <span style='color:#111;'> 165.47KB </span>","children":null,"spread":false},{"title":"第一章.PDF <span style='color:#111;'> 96.28KB </span>","children":null,"spread":false},{"title":"第七章.PDF <span style='color:#111;'> 117.86KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]