起重英語之吊臂伸縮安全裝置英文翻譯：

吊臂伸縮安全裝置        The scalable security device

吊臂伸縮安全裝置英語例句參考：

The expansion of the safety gear ： hook up to the prescribed level, touch 限位 three weight, open a switch, "round" sign is bright and cut off the hook up, the arm out, the arm down to wait for the operation. when asked to ensure the safety of operations, and the hook declined or withdrawn of the derrick back to the operation safety （ ） wait handles, make contact 限位 weight, that is normalized. operations

吊臂伸縮安全裝置：吊鉤起升到規定的高度后，碰觸限位3重錘，打開形成開關，“過繞”指示燈即亮，同時切斷吊鉤起升、吊臂伸出、吊臂伏到等動作的操作問確保安全。這時只要操作吊鉤下降，吊臂縮回或吊臂仰起（即向安全方操作）等手柄時，使限位重錘接觸約束，操作即恢復正常。