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发表于 2012-4-17 16:31
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Nezof 发表于 2012-4-17 15:08 / i! a! ~" T7 C& `/ m+ D
双层绝缘线中间是没空气的吧$ q, W; O" q; _
即使有的话,按照你这段的字面意思来看也是算的
& X. c- k! G& J M/ S; l: M已经找到答案了,以最外面的绝缘厚度为准。 v0 ]' Y% ~9 b* d/ d5 n
7.12 If a flexible light enclosure consists of multiple layers of polymeric materials, all layers shall comply: l6 h, R% ?0 Z* a7 x w8 }$ A6 ?
with 7.2 and only the outermost layer needs to comply with the UV resistance and water exposure) ?# H) A( H0 p0 B
requirements of 7.10(a), providing that the outermost layer complies with the minimum thickness of 7.4. |
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