contraprop

n.

一对互相反转的螺旋桨；

A Test Research on the Multiple-Tube Arrangement of New and High-Efficient PSC-250 Contraprop Type Cyclone Tubes
The Selling of F.D.N.; Contraprop
Electrohydraulic type contraprop adjusting device at entrance of compressor
Tractatus contra prophanas vocum novitates de paupertate Christi
Instituto de Historia de Nicaragua y Centroamérica
Energy Saving Technology Innovation of Oil Transfer Pump Station
[Photograph]: "Contra-Prop"
Five American Airplanes to Use "Contra-Prop"System
A semi-analytical model for broadband noise prediction from rotor-wake interaction in contra-rotating propfans
Broadband Noise Prediction from Rotor-Wake Interaction in Contra-Rotating Propfans