Modern containers with screw cap are often difficult to open — when unscrewing a tight twist receptacle slip in your hands, scrolls. To “win” it is easy enough to use a piece of sandpaper and the tube will be.
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LIKE THE PHONE
When connecting such a power source as an ordinary galvanic battery for flashlight, not so easy to achieve a reliable attachment of wires to flat pin made of thin sheet metal. Moreover,...
CLAMP? READY!
A simple clamp can be made from a long bolt, washers and nuts-lamb. The jaw faces are made of solid wood.
