煮沸 しゃふつ消毒 しょうどくではありませんでした
shafutsushōdokudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 煮沸消毒

1. Was not sterilized by boiling.; Was not boiled for sterilization.

Past/Perfective
Negative
Polite
Formal Register