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引用第5楼大侠风清扬于2009-07-21 11:33发表的 :! G2 M# k7 \6 m4 @
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
) B) k) P. C0 g! a, E% e1 [5 hi think my opinion is absolutely correct.* N5 ^: @; p; l4 F& G
see following clause, it is common in UL standard. i just pick it from UL 1004.& J* r( g/ r% n; v* K
9 a" c2 ~4 `8 V- B& n W4 B. }0 Q3 N3 Units of Measurement
; R' P; \, L5 S+ e# O. B7 L3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or
6 X3 R. ?4 e4 p% W' Tapproximate information. |
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