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.

半門座起重機
半門座起重機有一個單一的運行軌道，而另一端與高架鐵路連接。他們通常用在封閉工廠的工作場所。