網頁3 天前 · A rocket (from Italian: rocchetto, lit. 'bobbin/spool') [nb 1] [1] is a vehicle that uses jet propulsion to accelerate without using any surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at …

網頁5 天前 · The Buk (Russian: "Бук"; "beech" (tree), / bʊk /) is a family of self-propelled, medium-range surface-to-air missile systems developed by the Soviet Union and its successor state, the Russian Federation, and …