@base . a ; "2661-3530" ; . a . a ; "20240113144604.558924"^^ ; ; . a ; . a , ; "Ji xie gong cheng (Print, Singapore)" . , ; "机械工程 =" , "Ji xie gong cheng =." ; ; ; ; ; ; ; "Ji xie gong cheng =." , "机械工程 =" , "Ji xie gong cheng (Print, Singapore)" ; ; "http://cn.usp-pl.com/index.php/jxgc/index" . . "Singapore" .