ぎゃく推進 すいしんロケットじゃなかったです
gyakusuishinrokettojanakattadesu

Noun
Desu Copula

The polite, past negative form of 逆推進ロケット

1. Wasn't a reverse-propulsion rocket.; Wasn't a retro-rocket.

Past/Perfective
Negative
Polite
Casual Register