Thin drill bits are known to clamp in the Chuck of the drill difficult. However, there is a cartridge that copes with it easily — as used in the compass. That and they need to use it. Installing it in the drill and releasing of the leg of a compass, then insert it into the Chuck of a drill already is not difficult.
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MOTOR BOAT “MIRAGE”
At the time I had a chance to build and test many motor boats. The first water I came off the boat "star", the drawings of which were published in the October issue of the journal...
Portable Power Station
I propose a design for a gasoline-electric unit (GEU) "Firefly", designed for charging batteries, powering lighting lamps and other DC consumers at 12 V.
I developed this unit three...
