一个连续性测试器给电缆导线注入交流信号，从而找到电路故障。
A continuity tester injects an AC signal into the conductors of a cable to find circuit faults.
交流注入信号频率本文选择60 Hz，相对与S信号注入法，称为低频交流注入法。
Compared with the injected s signal technique, this method is called low frequency AC signal injection method.
交流注入信号频率本文选择60 Hz，相对与S信号注入法，称为低频交流注入法。
Compared with the injected s signal technique, this method is called low frequency AC signal injection method.
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