The screw should be lubricated regularly with engine oil to prevent retardarce.
The screw should be lubricated regularly with engine oil to prevent retardarce.
你要定期用机油润滑螺杆,防止螺杆阻滞.
The screw should be lubricated regularly with engine oil to prevent retardarce.
你要定期用机油润滑螺杆,防止螺杆阻滞.