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演算 えんざん増幅 ぞうふく器 きでした
enzanzōfukukideshita

敬
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Noun
, 
Desu Copula

The polite past form of 演算増幅器

1. Was an operational amplifier.

Past/Perfective
, 
Polite
, 
Computing

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演算増幅器でした

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