Semi-portal cranes

Semi-portal cranes have a single portal running on a ground based rail while the other end is attached

to an overhead rail. They are usually used where there is an outdoor storage yard running parallel to an enclosed factory.

半门座起重机
半门座起重机有一个单一的运行轨道，而另一端与高架铁路连接。他们通常用在封闭工厂的工作场所。