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引用第5楼大侠风清扬于2009-07-21 11:33发表的 :
) n8 e- H% B0 M0 b0 d- W2 B所有的美标规定,括号外的是要求值,括号内的是参考值,这个没有疑问了,我在某本美标上看到过, 如果需要我可以查一下这个 # x% q! l( z$ V2 X/ ~& h
i think my opinion is absolutely correct.
* L8 I% M' |0 Lsee following clause, it is common in UL standard. i just pick it from UL 1004.
% i) D/ n! Q$ S. I3 N) M5 v/ V9 s! p9 l
3 Units of Measurement' s1 B6 g" ^, y1 |6 b
3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or" Y$ r7 U% g, [ x1 K
approximate information. |
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