Warning: file_put_contents(/www/wwwroot/ppbbbu/oiqp.com/cache/ec169707aeb5ab3f19049c615cb063b0.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/oiqp.com/index.php on line 55 crank link gear例句_crank link gear英汉例句_crank link gear双解例句_奇葩剧汉英词典
Application of double crank-link and small tooth number difference planetary gear reducer in cranes and elevators; 對斜磐式錐齒少齒差行星減速器的一些重要傳動元件的制造方案進行了系統研究和論証。