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from article Venus
Sapas Mons, one of several large volcanic edifices that compose the broad equatorial rise known as Alta Regio. (Credit: NASA/JPL)
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Image
from article Venus
Computer-simulated perspective view, based on data from Magellan spacecraft, showing three impact craters in the northwestern portion of Lavinia Planitia with diameters ranging from 37 to 63 km (23 to 39 mi). (Credit: NASA/JPL)
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from article Vacuum pump
Comparison of the degree of vacuum attained by important types of vacuum pumps.
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from article Vacuum pump
Chief components of rotary oil-seal pump.
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from article Vacuum pump
Diagram of the water aspirator pump. Utilization of (a) water and (b) steam.
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from article Vacuum pump
Main operating features of diffusion pump.
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from article Vacuum pump
Size comparison of two diffusion pumps.
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from article Vacuum pump
The principal features of an ion pump.
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from article Platinum
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from article Medical control systems
Diagram of selected portions of the human motor control system. (After G. L. Gottlieb, D. M. Corcos, and G. C. Agarwal, Strategies for the control of voluntary movements with one mechanical degree of freedom, Behav. Brain Sci., 12:189–250, 1989)
