perfuração de botão de martelo
When the pile driver is working, the pile driver should be reliably grounded to reduce the risk of personal electric shock.
2, according to the aperture is not the same, the drill can be divided into light drilling rig, medium drilling rig, heavy drilling rig.
2, according to the aperture is not the same, the drill can be divided into light drilling rig, medium drilling rig, heavy drilling rig.