接地或接零线路 Grounding or neutralizing circuit 信号线路 Signal circuit 有接地极的接地线路网 Grounding with grounding electrodes ..
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计算机网络电源和信号线路的防雷击保护。
Computer network power source and signal circuit's against thunder stroke protection.
三刀开关最早用于切换伏特计保护及信号线路。
The three-pole switch was originally used to switch a voltmeter guard along with the signal lines.
如果用胶带将黑色屏蔽线固定到信号线路，则会减弱天线信号。
Reduced antenna signal if the black shielding lines are secured to the signal lines with adhesive tape.
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