門式起(qi)重(zhong)(zhong)(zhong)機(ji)(ji)是橋式起(qi)重(zhong)(zhong)(zhong)機(ji)(ji)的一種變形，又叫(jiao)龍門吊。主要用(yong)于(yu)室外的貨場(chang)(chang)(chang)、料場(chang)(chang)(chang)貨、散貨的裝(zhuang)卸作(zuo)業，具有場(chang)(chang)(chang)地(di)利用(yong)率(lv)高(gao)、作(zuo)業范圍大、適(shi)應面廣(guang)、通用(yong)性強等特點。太重(zhong)(zhong)(zhong)生產的門式起(qi)重(zhong)(zhong)(zhong)機(ji)(ji)，主要包(bao)含：通用(yong)門式起(qi)重(zhong)(zhong)(zhong)機(ji)(ji)、水電站門式起(qi)重(zhong)(zhong)(zhong)機(ji)(ji)等。