swivelling airscrew.
回转螺旋桨
reversible airscrew.
可逆式螺旋桨
supersonic airscrew
超音速螺旋桨
The Research of Measure Technology in Helicopter Airscrew Pyramidal Angle
直升机旋翼共锥度测量技术的研究
A Design for Online Testing System of Airscrew Electric Propulsion
空气螺旋桨地面电驱动在线测试系统设计
Moreover, they are also quieter, as they are not driven by an airscrew.
此外，由于不用空气螺旋桨驱动，所以噪音也比较小。
The airscrew included various propellers, fans, windmills and helicopter blades, etc.
空气螺旋包括螺旋桨、风车、风扇和直升机叶片等。
Specification for mahogany for use in airscrews.
螺旋浆用桃花心木规范
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