复式滑车的英文

例句与用法

1. The derrick to be laid down on deck , cargo blocks , span takles , guide rollers and all moving parts of derrick of derrick to be dismantled . cleaned and greased with special grese
   吊杆放置甲板上，吊货滑车，调节跨幅复式滑车，导轮及吊货杆上所有活动部件拆开，清洁，加优质润滑脂。