門式(shi)(shi)(shi)起(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)(ji)是橋式(shi)(shi)(shi)起(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)(ji)的一種變形，又(you)叫龍門吊。主要用(yong)于室外的貨場(chang)、料場(chang)貨、散貨的裝卸(xie)作業(ye)，具有場(chang)地利用(yong)率高(gao)、作業(ye)范(fan)圍(wei)大、適應面廣(guang)、通(tong)用(yong)性強等特(te)點(dian)。太重(zhong)(zhong)(zhong)生產的門式(shi)(shi)(shi)起(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)(ji)，主要包含(han)：通(tong)用(yong)門式(shi)(shi)(shi)起(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)(ji)、水電(dian)站門式(shi)(shi)(shi)起(qi)(qi)重(zhong)(zhong)(zhong)機(ji)(ji)(ji)等。