起重英语之门式起重机

Gantry  crane is a gate-type full-back rotation base bracket crane. its metal structure. as the portal frames and convey the beams of the two feet, you can direct in ground along the track on the beam at both ends may have extended cantilever beams.

门式起重机 具有门型底座的全回转动臂架式起重机。它的金属结构像门形框架，承载主梁下安装两条支脚，可以直接在地面的轨道上行走，主梁两端可以具有外伸悬臂梁。