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引用第5楼大侠风清扬于2009-07-21 11:33发表的 :3 @" |1 o6 r0 ^/ q
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 ; R J. x6 M" D4 I, [5 F9 D) Z- y" O
i think my opinion is absolutely correct.$ Y7 l: i" E& q; N' @$ P9 |
see following clause, it is common in UL standard. i just pick it from UL 1004.
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3 Units of Measurement
3 A5 Q# }5 ]6 q6 a3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or$ F: s9 V9 M/ G0 {* b1 i* p
approximate information. |
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