きゅう〇式 しき だい空中 くうちゅう聴音 ちょうおん であれば
kyūreishikidaikūchūchōonkideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 九〇式大空中聴音機

1. If it were a Type 90 Large Airborne Sound Detection Device; If it is a Type 90 Large Airborne Sound Detection Device

Ba Conditional