Going from  one extreme in technology to the opposite, the crews used car batteries and voltmeters to take  measurements of the conductor's resistance between tap points to precisely identify the location  of the fault within Mr. McMahon's neighborhood.

从技术的一个极端转向相反的技术，工作人员使用汽车电池和电压表测量分接点之间的导体电阻， 以精确确定麦克马洪先生附近的故障位置。