derrick mast
... mast-shaped derrick 桅杆式井架 derrick mast 扒杆 ; 起重桅 ; 吊货杆桅 pole derrick derrick mast 起重扒杆 ...
基于22个网页-相关网页
吊货杆及连接于吊货杆、桅和甲板的固定零部件的年度全面检验;
AI, Annual Inspection for Derricks and Permanent Attachments to the Derricks, Masts and Decks;
youdao
应用推荐
模块上移
模块下移
不移动