Drilling rig equipped with a main hoist, one vice hoist, main hoist for lifting drilling, downhole tubes.
钻机配有一个主卷扬机、一个副卷扬机。主卷扬机用于升降钻具、下井管等。
Derrick: the main hoist winch and a system of elevators lifts 1,250 tons of pipes and machinery through the 72.
钻塔：主起吊绞车和升降机系统可通过船底72英尺宽的开口，提升1,250吨重的管道和机械。
The main beam is the main hoist gantry crane force components, main beam directly affects the service life of machine.
主梁是葫芦门式起重机的主要受力部件，主梁的质量直接影响到整机的使用寿命。
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