连接放大器前，务必先连接地线。
Be sure to connect the ground cord before connecting the amplifier.
严格按操作要求使用仪器，本仪器采用单相三线插头，连接地线以确保用电安全。
Operation rules should be strictly followed. The instrument ADAPTS with a mono phase three pin plug, which connects to the earth for safety.
高处的终端D'连接线圈的A'中心，其它终端更适宜连接地线，同样，对于线圈C'在此之上鉴于安全再次提醒。
The elevated terminal D' connects with the centre of the coil A' and the other terminal is connected to earth and preferably, also, to the coil C' again for safety reasons as mentioned above.
应用推荐