main hoist

基本解釋

Derrick: The main hoist winch and a system of elevators lifts 1,250 tons of pipes and machinery through the 72
鉆塔：主起吊絞車和升降機系統(tǒng)可通過船底72英尺寬的開口，提升1,250噸重的管道和機械。
The main beam is the main hoist gantry crane force components, main beam directly affects the service life of machine.
主梁是葫蘆門式起重機的主要受力部件，主梁的質量直接影響到整機的使用壽命。
The rationality and reliability of main hoist reducer adopted with double spiders structure for large bridge crane are introduced.
介紹了設計大噸位雙鉤橋式起重機主起升減速器采用雙行星輪結構的合理性和可靠性。