... 装卸设备 Handling apparatus for loading and unloading 悬臂起重机 Derricks 气动传送装置 Pneumatic transporters ...
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TD TYOE DERRICKS 双杆吊
TD TYPE DERRICKS 双杆吊
swinging derricks 摆动双杆操作
Mobile drilling derricks 机动钻探车
Ships derricks 起重机等
k derricks k型井架
rig derricks 石油钻井井架
tyoe derricks 双杆吊
In oilfield, downhole derricks are the main part that bears the loads in the downhole operation hoist system.
在油田起下油(气)井管柱的各种施工中，作业井架是主要的承力构件，井架的承载性能对井下各种施工作业产生直接影响。
参考来源 - 作业井架的力学行为分析与承载能力研究Oil drilling derricks are important constitutes of oil industry equipments, it belong to large bearing structure. , take an important effect on oil production.
石油钻机井架是石油工业生产设备中的重要组成部分,属于一种大型承重结构,对油田生产起着重要作用。
参考来源 - ZJ40/225D钻机井架承载能力与安全评定研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N-COUNT A derrick is a machine that is used to move cargo on a ship by lifting it in the air. 起重机
N-COUNT A derrick is a tower built over an oil well which is used to raise and lower the drill. 油井塔
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