起重英语之吊臂伸缩安全装置

起重英语之吊臂伸缩安全装置英文翻译：

吊臂伸缩安全装置        The scalable security device

吊臂伸缩安全装置英语例句参考：

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 when asked to ensure the safety of operations, and the hook declined or withdrawn of the derrick back to the operation safety （ ） wait handles, make contact 限位 weight, that is normalized.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

吊臂伸缩安全装置：吊钩起升到规定的高度后，碰触限位3重锤，打开形成开关，“过绕”指示灯即亮，同时切断吊钩起升、吊臂伸出、吊臂伏到等动作的操作问确保安全。这时只要操作吊钩下降，吊臂缩回或吊臂仰起（即向安全方操作）等手柄时，使限位重锤接触约束，操作即恢复正常。