... cable broken switch 电缆开关 cable length switch 电缆长度转换开关 liftslack-cable-switch 电梯行索松断保护开关 ...
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若开关、互连电缆和测试夹具没有合适的屏蔽，所产生的杂散信号（偏移）将威胁到被测信号。
Without proper shielding of the switches, interconnecting cables, and test fixturing, spurious signals (offsets) may be generated that will compromise the signal being measured.
安装，检查，更换或修理电线，插座，开关箱，管道，馈线，光纤和同轴电缆组件，照明灯具和其他电器元件。
Install, examine, replace or repair electrical wiring, receptacles, switch boxes, conduits, feeders, fibre-optic and coaxial cable assemblies, lighting fixtures and other electrical components.
在测试样板和7158型开关卡之间应该使用低噪声同轴电缆，以避免噪声电流。
Low noise coax cables should be used between the test coupons and the Model 7158 CARDS to avoid noise currents.
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