Line on writing or desktop has “property” in the right time to get lost in the pile of papers, drawings, details. Fasten to the edge of the table, two cloves, and even better — screw two small screws with round head (not clung to); in the line also make two cut so that they easily included screws. Now the ruler will always literally at hand and never lost.
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The screw securing the knob or handle on vodozabornoy valve (valve, tap), made of bronze or brass. If it's lost or fallen into disrepair — not to screw in its place steel, even briefly,...
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