IEC 60884-1: 2002+A1: 2006 clause 12.3.12 如何理解？

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7 x6 R$ A$ @- h! y7 w' o9 U12.3.12 Screwless terminals shall be so designed that the connected rigid solid conductor remains clamped, even when it has been deflected during normal installation, for example, during mounting in a box, and the deflecting stress is transferred to the clamping unit. Compliance is checked by the following test which is made on three specimens of socketoutlets which have not been used for any other test.
( F; t+ ?, W# T4 U' i6 {问题1：
& ?4 w$ m' h* J, u( |$ h0 c: z做这个测试时，为什么一定要用三个没有做过任何试验的插座的试样来检查，而不是用象12.3.11那样，只用无螺纹端子来检查？

$ t! a5 F* Z( G2 F- V/ cIf, for any of the 12 test directions, the voltage drop is greater than 25 mV, the force is maintained in this direction until the voltage drop is reduced to a value below 25 mV, but for not more than 1 min. After the voltage drop has reached a value below 25 mV, the force is maintained in the same direction for a further period of 30 s during which period the voltage
% F4 @' P& S; V3 F' ^1 a, H5 e6 J7 Jdrop shall not have increased.
问题2：如果电压降大于25mV，要继续施加力直到电压降低于25mV，此力是与原来的力一样大吗？一直加力就可以使电压降低于25mV吗？

: n( z) t9 u9 b' |" x0 \问题3：现有如图的装置，如何来做无螺纹端子的弯曲试验？
' X8 I8 b: ~' X$ M