periscope
潜望鏡、ペリスコープ
Aquascope
Coincidence rangefinder
Relay lens
Rangefinder
Vickers Tank Periscope MK.IV
https://source.unsplash.com/featured/?periscope#.png
/suto3/google.iconperiscope
/suto3/Google画像検索.iconperiscope
/suto3/Google定義検索.icon periscope
/suto3/wikipedia.iconperiscope
/suto3/weblio.icon periscope
/suto3/kotobank.icon periscope
/suto3/jisho.icon periscope