
When the pencil lines of the drawing or drawing close to each other — the usual eraser, it is difficult to remove the erroneous one so as not to damage the adjacent correct. But this operation will be virtually the exact jewelry and if a thin slice of gum to hold in the “beak” of the spring: simple and convenient.
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"Ancestor" of this machine, lawn mower GK-1 was built by students in St Michael's training and production plant in 1978. About it has told the head of young technicians — lecturer of...
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Utilities are widely used shut-off valves — they are in all water inlets in the house and each apartment. Earlier these devices were made of iron or steel: casing — cast iron, and the...