門(men)式(shi)(shi)起重(zhong)(zhong)機(ji)是橋式(shi)(shi)起重(zhong)(zhong)機(ji)的(de)一種變形，又叫龍門(men)吊(diao)。主要(yao)用(yong)(yong)(yong)于室外的(de)貨場、料場貨、散(san)貨的(de)裝(zhuang)卸(xie)作業，具有(you)場地利(li)用(yong)(yong)(yong)率高、作業范圍大、適(shi)應面廣(guang)、通用(yong)(yong)(yong)性強等(deng)特點。太(tai)重(zhong)(zhong)生產的(de)門(men)式(shi)(shi)起重(zhong)(zhong)機(ji)，主要(yao)包(bao)含：通用(yong)(yong)(yong)門(men)式(shi)(shi)起重(zhong)(zhong)機(ji)、水電站(zhan)門(men)式(shi)(shi)起重(zhong)(zhong)機(ji)等(deng)。