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参考UL62中的定义:& u- o1 U, p( M+ y) y6 c5 {( d
Not-for-hard-usage cord – a cord intended for use with light equipment, classified as the lowest grade
# @) t3 V; `+ f) N- }. F* Din mechanical serviceability.& [5 c' _ t/ s* A7 m& y2 e
Hard-usage cord – a cord intended for use with moderately heavy equipment and for hand-held1 n9 y) Y7 p0 E2 t' H) e
appliances and tools, classified as the medium grade in mechanical serviceability.
. @1 b4 M% x4 U. w2 ~Extra-hard-usage cord – a cord intended for use with heavy equipment and for hand-held appliances
9 y, r, x6 e: U _and tools, classified as the highest grade in mechanical serviceability. |
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