1. Before using the tool, the full-time electrician should check whether the wiring is correct and prevent the accident caused by the misconnection of the neutral line and the phase line. 2. If the tool that has not been used for a long time or is da..

1. The speed should be as high as possible. Before use, the motor must reach the highest speed before sawing, drilling, etc., otherwise it is easy to damage the motor. In use, the motor should reach the maximum speed as much as possible. overload.