基本解释[機械工程]菸火型推進劑英汉例句雙語例句Upon vehicle impact, a pyrotechnic propellant charge is ignited electrically.車輛發生碰撞時,電子點燃焰火式推進劑填料。pyrotechnic propellant更多例句专业释义機械工程菸火型推進劑