无线通信装置，无绳电话，显示操作控制方法，程序及存储介质。
Radio communicator, cordless telephone, display operation control method, program and storage medium.
操作过程由于介质压力是有助于阀门开启的，所以减小了操作力矩。
Operation process as the medium pressure is help to open valve, so reduce operating torque.
操作过程由于介质压力是有助于阀门开启的，所以减小了操作力矩。
Operation process as the medium pressure is help to open valve, so reduce operating torque.
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