Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
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In No. 12 "M-K" for 1984 described how to lengthen short pencil cut with a thin-walled tube. I'm here for several years are not a pipe extender, and a cap from a ballpoint pen. Pencil it...
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On the instructions of the enterprises of Dzerzhinsk-khimpromenergo in the design office of the school # 2 of Dzerzhinsk, Gorky region, the guys have designed and built a device for...
