既然通断性测试往往涉及到多导线装置，因此利用一套开关系统将欧姆表自动连接到每根导线就非常有用。
Given that continuity testing often involves multi-conductor devices, a switch sys tem is useful to connect the ohmmeter to each conductor automatically.
连接测试设备和探针的导线来回的传递测试信号。
Wires running from the tester interface to the probes carry test signals back and forth.
该方法简便易行，其定位结果的精度不受击穿点电阻和测试用连接导线的电阻及其接触电阻的影响。
The method features easy operation and good location accuracy that is not affected by the resistance of breakdown spot, the resistance of the test wire and contact resistance.
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