Heavy Lift Mast Crane, Floating Sheerleg, Offshore Crane.
大型桅杆吊，浮吊，海洋工程吊。
Crane monitoring system of offshore oil drilling platform is introduced.
介绍了海洋石油钻井平台吊机监测系统。
Modules are transported offshore on deck barges and lifted into place by derrick or crane barges.
模块用甲板驳船运至海上，并由起重船或浮吊吊入适当位置。
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