|
参考UL62中的定义:5 T$ g7 a6 L4 Q5 l+ T$ z
Not-for-hard-usage cord – a cord intended for use with light equipment, classified as the lowest grade1 b* |; d$ @& S
in mechanical serviceability.
# G, W- f+ p$ \: gHard-usage cord – a cord intended for use with moderately heavy equipment and for hand-held( m3 \# A* Q" f( p; K
appliances and tools, classified as the medium grade in mechanical serviceability.% D7 U6 M' J' ^9 Z2 G
Extra-hard-usage cord – a cord intended for use with heavy equipment and for hand-held appliances8 {: I7 a0 z( `1 q
and tools, classified as the highest grade in mechanical serviceability. |
|