au·to·trans·form·er /ˌɔtotræn(t)sˈfɔrmɚ/
  自動變壓器
  au·to·trans·form·er /ˌɔtotræn(t)sˈfɔrmɚ/ 名詞
  自耦變壓器,單卷變壓器
  Au·to·trans·form·er n.   Elec. A transformer in which part of the primary winding is used as a secondary winding, or vice versa; -- called also a compensator or balancing coil.
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