燃料 ねんりょう気化 きか爆弾 ばくだんでしょう
nenryōkikabakudandeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 燃料気化爆弾

1. Probably a fuel-air explosive.

Polite
Presumptive
Conjecture