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506888
Caption: The artificial lift of petroleum with a beam pumping unit
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 21.09 MB
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506700
Caption: The rocker, or cradle, form of placer mining enabled one miner to handle more material than by simple panning
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 33.43 MB
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481425
Caption: The brewing process, which turns barley and hops into the alcoholic beverage of beer.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 39.30 MB
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114992
Caption: Dental assistant with extracted tooth
Artist: ImageZoo
Release: Not Applicable
File Size: 27.81 MB
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116072
Caption: Dentist removing teeth of patient, side view
Artist: ImageZoo
Release: Not Applicable
File Size: 29.68 MB