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National Bureau of Standards: Its Functions and Activities
Preliminary flight tests of the N.A.C.A. Roots type aircraft engine supercharger
Air force and moment for N-20 wing with certain cut-outs
An Investigation of the Use of Discharge Valves and an Intake Control for Improving the Performance of N.A.C.A. Roots Type Supercharger
Comparison of hecter fuel with export aviation gasoline
The Battalion, Volume 29, Number 30, April 1921
Lateral-Wear Reducer for Locomotives.
Wrench
Vehicle-Body
Wheel-Tread.
Tool-Joint.
Tire-Oven.
Tatting-Shuttle
Spring-Wheel.
Shutter-Actuating Apparatus.
Shredding and Blending Mechanism for Feed.
Float-Controlled Liquid-Gaging and Cut-Off Means.
Insulator.
Pipe-Perforator
Pipe of Concrete and the Like
Means for Holding Slats to Belts
Peanut-Harvester
Pneumatic Pump.
Door Stop and Holder.
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