【化】 American Standard of Testing Materials(ASTM)
America; U.S.; U.S.A.; United States; the United States of America
【经】 U.s.; Us
【化】 material test; testing of materials
criteria; level; mark; measure; normal; par; rule; standard; criterion
【计】 etalon; normal; STD
【化】 standards
【医】 norm; normo-; rubric; standard
【经】 denominator; norm; standard