[{"title":"( 2 个子文件 847KB ) 离心泵叶轮数字化造型原理与算法研究.rar","children":[{"title":"离心泵叶轮数字化造型原理与算法研究","children":[{"title":"离心泵叶轮数字化造型原理与算法研究.PDF <span style='color:#111;'> 857.08KB </span>","children":null,"spread":false},{"title":"readme勾月.txt <span style='color:#111;'> 354B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]