門式(shi)(shi)起(qi)(qi)重(zhong)機(ji)(ji)是橋式(shi)(shi)起(qi)(qi)重(zhong)機(ji)(ji)的(de)一種變形(xing)，又叫龍門吊。主要用(yong)(yong)于(yu)室外的(de)貨場(chang)、料場(chang)貨、散貨的(de)裝卸作(zuo)業(ye)，具有(you)場(chang)地(di)利用(yong)(yong)率高、作(zuo)業(ye)范圍大、適(shi)應面廣、通(tong)用(yong)(yong)性強等(deng)特(te)點。太重(zhong)生產的(de)門式(shi)(shi)起(qi)(qi)重(zhong)機(ji)(ji)，主要包(bao)含：通(tong)用(yong)(yong)門式(shi)(shi)起(qi)(qi)重(zhong)機(ji)(ji)、水電站門式(shi)(shi)起(qi)(qi)重(zhong)機(ji)(ji)等(deng)。