求助UL1082

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求助UL1082
11章电源线中的pin terminal 这一段怎么看也不明白，请高手解释解释，在此谢过！！


11.3.2 A pin guard is required, such that:

a) A straight edge placed in any position, across and in contact with edges of the plug opening without the plug in place, cannot be made to contact any current-carrying pin.

b) With the plug aligned with the pins and the face of the plug in a plane located perpendicular to the end or ends of the farthest projecting current–carrying pin, the probe illustrated in Figure 7.2 should not touch any current-carrying pin while the probe is inserted through any opening with the appliance in any position.