IEC 60320-1 clause 9.5中的注1如何理解？

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IEC60335试验指甲

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9.5 If appliance inlets are arranged countersunk in the outer surface of equipment, and if this
surface is curved or inclined with respect to the axis of the appliance inlet, the arrangement
shall be such that, under any circumstances, the pin ends do not protrude beyond the limiting
surface of the shroud.
/ }6 g) }0 G( k# kCompliance is checked by connecting all pins, including the earthing pin, if any, together with
one pole of a contact indicator, the other pole being connected to a metal straight-edge ruler,
having a width wider than the largest inside dimension of the appliance inlet, which is placed in
& j; m# ]5 J8 sall possible directions over the opening of the shroud. The ruler shall not come into contact
/ s$ i# x& L7 ~. M8 m  r( vwith the pin ends.
NOTE 1 For 10 A and 16 A appliance inlets for class II equipment, the test shall be carried out with a simulated earthing pin.
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& ]8 q+ X+ k- e- i  a. J- E, ?4 A问题：注1中， 如何用模拟接地插销来做检查？

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