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DC - national differences based on UL and CSA component requirements. DC9 O, P3 o1 a' {1 b2 [) Y
national differences may be less stringent than, equivalent to, or more stringent than& S; i5 X! D( x f. [. p
component requirements in IEC 60950-1." f3 `8 c. d* b8 V3 i
( f' b$ m& f2 b* c/ F. ]
DE - editorial national differences that correct typographical errors in IEC 60950-1 or; b( C4 M$ p( _" r" Z7 W7 e2 x
revise the terminology, but do not alter the technical intent of the requirements. This
! V/ d7 c$ G& F8 w, H- u" J( c5 p: Wnotation is also used for informative statements such as the Preface.
2 [- C8 u# _+ R' r3 e* X1 y8 x v
其實還有很多,這些定義在UL標準非常前面的General的地方有定義. |
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