A simple clamp can be made from a long bolt, washers and nuts-lamb. The jaw faces are made of solid wood.
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For twelve years Hobbies quinoloneresistant I developed and produced a number of useful gadgets to the cameras: for filming with the influx, defocusing, with multiplier prisms, feedback...
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Sometimes you need to get easily collapsible gusset. Use the hinge type piano, but remove the axle. There are also more simple variant — with a normal hook. The figure shows three...