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。
The rationality and reliability of main hoist reducer adopted with double spiders structure for large bridge crane are introduced.
介绍了设计大吨位双钩桥式起重机主起升减速器采用双行星轮结构的合理性和可靠性。
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