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primary winding
el.tract. 一次巻線 (ichiji-makisen)
n primary winding | n
gen. 一次コイル (in transformer, ichiji-koiru); 1次コイル (in transformer)
primary winding of a current transformer
transf. 変流器の一次巻線
primary winding of a voltage transformer
transf. 計器用変圧器の一次巻線