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参考UL62中的定义:# Z3 ^0 }" ]( {2 S; s
Not-for-hard-usage cord – a cord intended for use with light equipment, classified as the lowest grade2 b" d) z3 { n& M" z8 j
in mechanical serviceability.
% x3 P' f* w5 I, h+ L6 V* wHard-usage cord – a cord intended for use with moderately heavy equipment and for hand-held v) Z) p. @; `0 j' |( W: \2 V6 O
appliances and tools, classified as the medium grade in mechanical serviceability./ D1 D z8 y( y
Extra-hard-usage cord – a cord intended for use with heavy equipment and for hand-held appliances
6 i7 N6 j, F) Kand tools, classified as the highest grade in mechanical serviceability. |
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