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24.3 The bases of surface type socket-outlets are first fixed to a cylinder of rigid steel sheet,0 [( k# }- d6 V* j @3 U1 A% t" |" p
having a radius equal to 4,5 times the distance between fixing holes but, in any case, no less
3 A- _# {6 ^8 Uthen 200 mm. The axes of the holes are in a plane perpendicular to the axis of the cylinder3 U$ A( v* a8 h# l$ N2 J+ R* v
and parallel to the radius through the centre of the distance between the holes.
, G1 Z( z" T0 c' h/ l* RThe fixing screws of the base are gradually tightened, the maximum torque applied being4 y# k; s, {4 i Z8 O) V0 F L; y' h
0,5 Nm for screws having a thread diameter up to and including 3 mm and 1,2 Nm for screws5 w" s& V: \/ u2 X
having a larger thread diameter.
" c O. ^6 G# Y- W$ fThe bases of socket-outlets are then fixed in a similar manner to a flat steel sheet.( e, n+ B) e* B
- Y6 G' A0 S { T2 _5 {
问题：这个试验装置是什么样的？* t$ e( Q j1 P* p. B
Q1 h4 B0 @0 \% }# W4 t |
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发表于 2015-10-23 16:37
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