O. W. Landergren (Popularity: )

Spun aluminium toroids, up to 52" in diameter.
Category: Science\Technology\Electronics\High Voltage

Ultrasonics Steckmann GMBH (Germany) (Popularity: )

ultrasonic welding and cutting
Category: Science\Technology\Acoustics, Ultrasound and Vibration\Ultrasound

Airfoils by Chris Heintz (Popularity: )

A textbook that discusses airfoil aerodynamics as applied to STOL aircraft.
Category: Science\Technology\Aerospace\Aeronautics