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请教一下:
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8 }5 X. I# G8 m8 _' ^. Z& NEN 60335-1 Cl.23.3:Open-coil springs shall not be used to protect the wiring. If a coiled spring, the turns of which touch one another, is used for this purpose, there shall be an adequate insulating lining in addition to the insulation of the conductors.
; x! D5 t, p% a9 V, _0 z5 _此条款中的open-coil spring是指什么弹簧?有没有图片可以举例一下? : F2 l6 ~8 W! G0 A7 M, l$ g# o, _
另外下图中的弹簧属于Open-coil springs吗?
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