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water jet pump 198
-, pump properties 199
water ring pump 162,169
-, cavitation 173
-, pump properties 175
-, pumping speed curves 171,174
-, single-stage 171
-, two-stage 171
-, volumetric pumping speed 170
water vapour 668,669,670,671
-, vapour pressure 672
welding 584
-, electron beam 587
-, explosion bonding 588
-, laser 587
-, microplasma arc 587
-, spot 588
-, TIG 586
wet (rotary) pumps 162,168
Wheatstone bridge 391,411
Wheeler flange 583
White and Hickey, see ‘halogen leak detector’
wide range turbo pump, see ‘hybrid molecular pump’
working discipline 655
working fluids 650
working pressure 352
working range 163,166
