1, the grounding switch <br>a. Before and after the mechanical operation testing, multiplexing practicing hand 5 times, the normal operation. <br>B. practicing hand closing and 2000 times for each operation, the normal operation.
1, ground switch<br>a. Before and after the mechanical operation test, the hand force is divided 5 times each, the action is normal.<br>b. Hand-in-hand operation 2000 times, normal action.
1. Earthing switch<br>a. Before and after the mechanical operation test, the hand force is closed and opened 5 times respectively, and the action is normal.<br>b. 2000 hand opening and closing operations, normal operation.