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? ?2014-1-19 19:08:51 ?
???????????????????????ε??????????????????????￡??27???￡??20???????????????????
???????????????ac220vac380v?????27棬?35棻????ac220vac380v????20棬?7档
???￡??￡?35???????l棬????1.4%??￡?7???????l棬????1%
??￡????ac220vac380v????????1v????￡1?0.025a1.5?0.025a×l.52?0.025a×23?0.025a×33?0.025a×3/35?0.025a×5/3.10?0.025a×l0/3
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???????????′27??У??????????????????0.49mpa?0.25mpa()????????为?С?????????为??为????????????????????????Щ???Щ
???硢??27￡??????±?
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???????????10cm2??12棻?16棻????е?????????????????′400c
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