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引用第5楼大侠风清扬于2009-07-21 11:33发表的 :' n) _2 j6 `: k
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 9 p! E) l9 y3 U. I& U) {; ]. K$ W
i think my opinion is absolutely correct.1 d v Q8 {! y1 {
see following clause, it is common in UL standard. i just pick it from UL 1004.$ e6 F+ t7 i) h) ~8 f k, ]8 f
! z) F& K+ D4 }5 D! s/ ]9 U* l1 |3 Units of Measurement' I6 |6 i; e. g7 ] l
3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or
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