Introduction - ASTM International

In general, avoid the use of symbols in text. When stating dimensions, use "by" not x, for example, "10 by 5 in. (254 by 127 mm)." Show tolerances, for example, as 10 by 5 ± 2 in. (254 by 127 ± 6 mm)." Do not use a hyphen or a dash for the word "to" except in tables where needed to conserve space. ................
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