Warning: file_put_contents(): Only 0 of 7109 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/oclz.com/index.php on line 55 portal jib crane是什么意思，portal jib crane的翻译，portal jib crane音标、读音、用法和例句_菜篮子兴趣思朗文词典
A brand-new jib-bridge luffing system of crane is brought out based on analysis of the limitation to handle containers of the portal crane. 在分析門座起重機用於集裝箱裝卸作業的侷限性的基礎上，提出一種新型的起重機變幅系統。