起重英語之門式起重機

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.

門式起重機 具有門型底座的全回轉動臂架式起重機。它的金屬結構像門形框架，承載主梁下安裝兩條支腳，可以直接在地面的軌道上行走，主梁兩端可以具有外伸懸臂梁。