AC moving coil round instrument 交流动圈式圆形电表
DC moving coil round instrument 直流动圈式圆形电表
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RESULTS: The round coil and splayed coil were tested respectively.
结果：分别对圆形线圈和八字线圈进行了测试。
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The round coil and splayed coil were tested respectively.
分别对圆形线圈和八字线圈进行了测试。
When direct current flows through a coil a magnetic field will be built up round the coil.
当直流电流过线圈，就会在线圈的周围产生磁场。
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