Even if storage together with small tools marking pencil will not lose the sharpened stylus, if it is to protect your cap
of a ballpoint pen.
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CANISTER-SINK
Sink can be made of ordinary plastic cans of 5 litres and curved, as shown in the figure, a metal tube. Tightness is ensured by a gasket made of thick rubber, is placed in the tube. The...
THYRISTOR VOLTAGE REGULATOR
My thyristor voltage regulator (THREE) is easy in manufacture and adjustment, linearity regulation and high power output — 200 watts without heatsink and 1000 watt radiator cooling area...