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第20章有下面两段话
# B# x& T& K. D( f/ tResistors and inductors are not connected in parallel except, if an air-core inductor is used, a
( F6 M9 f* N/ o: n! B$ K) ]% kresistor taking approximately 1 % of the current through the inductor is connected in parallel
$ ^6 ?! E3 p* Rwith it.
/ ~6 ^. V! j! D" eIron-cored inductors may be used, provided the current has a substantially sine-wave form.
' L/ q$ {* c, v8 p2 ?3 BFor the test on three-pole accessories, three-core inductors are used.! C* L) p% u6 {/ o8 D" A
问题1：如何理解上面这段话？
5 \, M; M" ^, U% B2 c! h. }1 N1 q: {
Accessible metal parts, metal supports and any metal frame supporting the base of flush-type4 q4 F) L# }0 y
socket-outlets are connected through the selector switch C; for two-pole accessories, to one E: l0 _5 i# m& D- C ^
of the poles of the supply for half the number of strokes, and to the other pole for the
3 x5 q* M7 n- z. f T5 Jremainder;: a/ X& P' s, l3 W2 C. Q! r8 o
问题2：如何理解上面这段话？
7 E0 i' p* O& m, h+ R5 F" A; F0 f. ]( \9 w# _1 n) z/ H
, z$ s7 a$ c1 N( V% H
$ w0 J, [4 l5 v2 w/ Y4 v" N |
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发表于 2015-10-23 14:18
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