てい周波 しゅうは発振 はっしん でしょう
te ishūhahasshinkideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 低周波発振器

1. Low-frequency oscillator, probably.; It's likely a low-frequency oscillator.

Polite
Presumptive
Conjecture
Computing