To drill from the opening in the wall, lined with tiles, for example in the bathroom, I first clean lazurevy layer rotational motion of an ordinary glass cutter, carbide wheel pressed in the center hole. Then the tiles can be easily and drill. G. NECHAEV, g Perm
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AIRPLANE F-3
In our city of Kingisepp there was a gliding club ROSTO, where I worked as a pilot instructor since 1996. The club had two light aircraft and four gliders. But they were all far from new....
CONTACTLESS CAPACITIVE RELAY
The basis of a capacitive relay — a low-power generator of high frequency such as local oscillator of a radio receiver. To the circuit L1C4 (see diagram) of the connected metal plate...
