derricking 中文意思是什麼
derricking
解釋
臂架俯仰-
The hoisting, derricking and slewing mechanism, the extension and contracting of booms, the setting down and back of outriggers, all are driven hydraulically
該機的起升、變幅、回轉、吊臂伸縮及支腿收放等機構，全部採用液壓驅動。
分享友人