◆開(kai)關內部電子部分(fen)在相應(ying)使(shi)用中--并做(zuo)過(guo)相關測(ce)試,本開(kai)關適(shi)合做(zuo)二類器具(ju)開(kai)關使(shi)用.
◆The electronics in the switches had to be tested together with the corresponding appliances, so the switches are suitable for appliance of class II.