British single-seat fighter aircraft of the first world warBritish single-seat fighter aircraft of the First World War
A special single-shot pistol with a removable buttA special single-shot pistol with a removable butt
The soviet single-engine fighter was one of the lightestThe Soviet single-engine fighter was one of the lightest
Yak-9k-soviet, single-engine fighter, gorosa german columnYak-9k-Soviet, single-engine fighter, gorosa German column