您要查找的是不是：
- 吊杆船floating derrick
- 笼格吊杆lattice derrick
- 小艇吊杆launching derrick
- 轻型吊杆light derrick boom
- 舷外吊杆outboard derrick
- 吊杆跨度outreach of derrik
- 网格吊杆bar lattice boom
- 吊杆负荷derrick capacity
- 吊杆绞车derricking winch
- 科桁支索从桅上斜杆或摇臂吊杆的顶端拉到甲板上的牵索。A guy running from the peak of a gaff or derrick to the deck.
- 放下吊杆To set a derrick down
- H型吊杆H-shaped boom
- 钢吊杆steel suspender
- 牵吊杆steeve
- 吊杆索suspender cable
- 吊杆力tensile force of rod
- 集装箱吊杆container derrick
- 液压传动吊杆hydraulic derrick
- 锅炉吊杆boiler hanger rod
- 摇枕吊杆bolster hanger
