derricking meaning in English
臂架俯仰
变幅
吊臂起落
改变起重臂倾角
伸距变化
Examples
- The hoisting , derricking and slewing mechanism , the extension and contracting of booms , the setting down and back of outriggers , all are driven hydraulically
该机的起升、变幅、回转、吊臂伸缩及支腿收放等机构，全部采用液压驱动。