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Giảm nguy hại từ sóng hài trên lưới điện

06/19/2014 03:05:51

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How to quickly fix solder that won't melt? What should be done?
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The soldering iron is hot, yet even after touching the resistor lead for ten seconds or more, the solder just clumps up instead of flowing smoothly. A novice's first instinct is often to crank up the temperature. While that sometimes works, temperature isn't always the root cause; in many cases, increasing the heat only burns the flux and pads, potentially ruining the component leads in the process

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