Gantry cranes

Gantry cranes have two upright supports (portals) which move along two ground based rails. The height

of the portals depends on the maximum hook height. Gantry cranes are used in factories and in outdoor

storage yards such as railway and shipping storage areas.

龍門起重機
龍門起重機有兩個鐵軌支撐，并且能在鐵軌方向上移動
貨物的起升高度取決于最大起升高度。龍門起重機用于工廠和室外
如鐵路和航運貯存區堆場等場所