Everyone knows about support and resistance, since marking them requires nothing more than a pencil and a ruler.
每个人都知道支撑和阻力，因为只要一支笔和一把尺子就能画出来。
Spot protection, group of lines marking, resistance electric capacity reason protection;
焊点保护、线束标识、电阻电容的绝缘保护；
Spot protection, group of lines marking, resistance electric capacity reason protection;
焊点保护、线束标识、电阻电容的绝缘保护；
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