L single girder gantry crane is a bridge type, suitable for open storage for general cargo railway transport loading and unloading and lifting operations.

型单梁门式起重机属桥架型的一种，适用于露天仓库货铁路沿线进行一般的装卸及起重搬运作业。

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Shipbuilding gantry crane a kind of gantry cranes of large lifting capacity, mare ultifunctions, and high efficiency which is dedicated for large hull staging, butt and flip operations in docks.

造船门式起重机是一种大起重量、大跨度、多功能、高效率的门式起重机械，专用于船坞（或船台）进行大型船体分段运输，对接及翻转作业。

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