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ascertain the value, amount, or degree of quantity by using an instrument or device marked in standard units, suuruse väärtust, kogust või astet kindlaks tegema, kasutades mõõtühikuväljundiga mõõtevahendit
to be used for determining mesh sizes shall be 2 mm thick, flat, of durable material and capable of retaining their shape. They shall have either a series of parallel-edged sides connected by intermed
distance between the interior surfaces of the two railheads of a single track, measured on a given distance below the upper rail surface, the smallest distance between a pair of rails measured between the inside surfaces of the rail heads., raudteerööbaste siseservade vaheline kaugus millimeetrites