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引用第5楼大侠风清扬于2009-07-21 11:33发表的 :
. o8 h. o/ D3 z' s" q2 s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 4 O) W5 p4 R' s3 p `
i think my opinion is absolutely correct.
9 Z" ]0 ?# W# j! `7 lsee following clause, it is common in UL standard. i just pick it from UL 1004.% B1 q: d: f" f! g" ^* F
6 `/ }6 w. v" d0 F$ a6 O+ ^1 |3 Units of Measurement
6 h. i/ w, B! g$ x- ], l3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or
6 |( i/ v! Z H/ w* L6 k- Y3 k9 `approximate information. |
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