×
Log in
Get Started
Travel
Technology
Sports
Marketing
Education
Career
Social Media
+ Explore all categories
Report -
AD 9 13 - DTICThe name "ducted propeller" means a propeller-annular air-foil combination acting as a propulsion unit. The annular air-foil or duct can be used either to accelerate
Select
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Please pass captcha verification before submit form