the key to the system is out of operation for motor valve

摘要

the key of the music system is electric motor valve operation is started. the key to this system is with the motor valve operation mode selection part is located in the locking mode, the power supply is controlled by the motor, and the supply is not, any user operation, the operation can not be. therefore, to prevent the valve operation. also, the mode of the lock mode position by rotating the mode selection state is not fixed and can, therefore, more secure.