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引用第5楼大侠风清扬于2009-07-21 11:33发表的 :$ \# x# w( s3 k* ~9 {; W" c) M0 h% F% h" ?
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
) F9 j! M/ a0 ti think my opinion is absolutely correct.$ r8 g( h4 H, r- Z2 j9 R% \4 q
see following clause, it is common in UL standard. i just pick it from UL 1004.
# y* ~) Y0 T1 k4 B$ o$ R7 ~( j" s
- M' H3 u4 m: V# ^6 Q* i3 Units of Measurement
$ K7 N( Z# g8 p: F5 J3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or
8 ]7 F, O5 @: x% Y$ ~% iapproximate information. |
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