Job security: electric jack has lift the self-locking protection device that, when beyond top heave range will automatically stop lifting, safe and reliable.
工作安全：电动千斤顶具有升降自锁的保护装置，当超出顶举范围时将自动停止升降，安全可靠。
2
The installation of mechanical hand carried on a mobile vehicle on the lifting platform, which has larger working height and moving range.
安装机械手搭载在移动车体的升降台上，使其具有较大的工作高度和移动范围。
3
In a certain range, if the lifting material beyond its corresponding weight, the circuit will be cut, so that lifting can not be carried out to ensure the stability of the crane.