这位资深工程师所知道的就是两个音响部件之间的连接，两段铜线和一些绝缘介质之间的接收器、混音器、放大器和扬声器。
What the senior engineer knew was the connection between two sound components — such as receiver, mixer, amplifier, and speakers — went beyond two copper wires and some insulation.
具有较小的绝缘介质损耗。
50 KV采用计算机控制，通过人机对话方式，完成对绝缘介质的工频电压击穿，工频耐压试验。
ZJC-50KV controlled by computer, through the man-machine dialogue mode, the voltage breakdown insulation, power frequency withstand voltage test.
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