gantryn.(起重的)龙门架；跨轨信号架；(火箭发射设备的)竖架gantry crane with rope trolley绳索小车门式起重机gantry crane for three purpose三用龙门起重机gantry-moving milling machine龙门移动式镗铣床gantry crane with man-trolley带司机小车的龙门起重机gantry crane with movable girder可移动主梁门式起重机gantry-moving machining centre龙门移动式数控加工中心gantry crane with rope-trolley牵索吊运车式龙门起重机gantry crane with shuttle girder滑伸式龙门起重机Gantry - type Machining Center龙门加工中心gantry crane with retractable boom可伸缩悬臂门式起重机