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引用第3楼aha0827于2011-04-15 13:47发表的 :- G" w% o0 e* s$ ^: }5 l2 t
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! Y( c) \$ j9 L: ]UL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
- y& z7 e+ R$ N0 y- x. ~& G) g在UL60950-1中插孔极性标识是通过以下来规定的吗?
* Z/ G# y; ]3 j/ t' t) P" Z----Symbo for nature of supply , for d.c. only
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UL60950-1 中是通过Symbo for nature of supply , for d.c. only规定的,而且还可以参考TableNAA.1(informative)1.7.1 7 ~ D0 ^ E( ]+ ]" O$ m
- r3 z0 H- U+ Y7 ^! U N$ g/ \" x: x1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c
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" K: ^* d+ {( f( o) u' wUL1310 我刚才看到是2001年的,第五版在clause 51.6
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+ X6 K, a. y0 M. k$ R! UThe polarity of a direct-current output shall be plainly marked, unless the unit is provided with a3 \: @: L, i) U5 P
polarized termination. |
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