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引用第5楼大侠风清扬于2009-07-21 11:33发表的 :
$ S: |2 b; H( N6 u Q; j$ ~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
. m# v* y3 c* Q, }& n( t' N9 V: @1 T# ni think my opinion is absolutely correct.
) R2 k2 h6 n+ o9 _see following clause, it is common in UL standard. i just pick it from UL 1004.4 `- c3 _8 s0 N$ _3 Y; J8 J. g( h) W
* \1 f' H' \& x5 h7 b$ p
3 Units of Measurement/ \0 G6 h( ?- I
3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or' L" o7 x* `& K1 B
approximate information. |
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