1. The reduction of the air friction in the valve is similar to expanding of the valve, which increases the air coming in and out.

2. Designed with air friction shaft, this machine can precisely control tension through air pressure.

3. During flight, air friction would cause the temperature of the signature nose to reach 127 degrees celsius.

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4. It's above the water, so if it moves now all it has to overcome is the air friction and that's it and that helps tremendously.

5. To prevent the engine structure from melting because of air friction from the supersonic flow, engineers use "active cooling" schemes.

6. If you throw two penniesoffthe Empire State Building at different speeds, air friction causes themtoapproach the same terminal velocity.

7. Among them, the door, trunk, car chassis, hood and roof is the most easy to produce the air friction noise place, therefore, these places are the focus of sound insulation noise reduction processing.

8. The formulae of time and range of projectile with the projecting angle taking account into air friction are obtained by using the approximate method to solve the equation.

9. The metallurgist has recently found a metal skin for missiles and supersonic planes, one that will retain its strength at the high temperature caused by air friction.

10. The evacuated tube high-speed transport means the maglev train will go through a evacuated pipeline, which may cause no obstruct of air friction to raise its speed.

11. And another major centrifuge noise source is: centrifuge operation, from the heart and centrifugal air friction inside the cavity of the voice.

12. A steel wire rope (6) structure in the hose can effectively eliminate static electricity generated due to air friction on the quick-change hose, thereby meeting production requirements.

13. That never changes if there is no air drag or air friction of any kind.