圧電 あつでん振動 しんどう ではありませんでした
atsuden shindō shidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 圧電振動子

1. Was not a piezoelectric vibrator.; Was not a piezoelectric oscillator.

Past/Perfective
Negative
Polite
Formal Register