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differentia
differential
differential amplifier
differential calculus
differential coefficient
differential equation
differential gear
differential rotation
differentiate
differentiated product
differentiation
differing
difficult
difficulty
diffident
diffract
diffraction
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diffusion pump
dif·fu·sion pump (plural dif·fu·sion pumps)


noun 
Definition:
 
high vacuum pump: a pump for producing high vacuums in which one or more plates acting as baffles deflects vaporized oil and removes gas particles with the stream
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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