航空、航无推进系统
Aerospace propulsion system
内外生殖器无器质性病变
no organic pathological changes to internal or ext
无舵对称推进器
Symmetic propulsion without rudder
传声器声压灵敏度
pressure sensitivity of microphone
传声器声压频率响应
pressure frequency response of microphone
半转叶片推进器
half-revolution balde propeller
变距推进器
adjustable pitch propeller
冰区加强推进器
ice-strengthening propeller
波动仿生推进器
undulated biomimetic thruster
undulatory biomimetic propulsor