Motorists know how important good contact terminals of the power supply from the battery. Easy to clean inner surface will allow a drill or electric screwdriver: enough is inserted in the cartridge rod to screw the flap of sandpaper.
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NO MATTER WHAT TROUBLES
If you have Minnie children - protect them from an accident by a gas or electric stove protective "fence" of wire or duraluminium corners.
INSTEAD OF THE ARROW LAMP
In the Arsenal of the Amateur radio voltmeter almost the most important measuring device. But the trouble is that to produce and it is not always possible. And not because the scheme is...
