RM
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Illustration of a patient undergoing trepanning treatment This is a surgical treatment in which a hole is drilled into the patients skull Historica
RM
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Cupola Furnace
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Cupola Furnace
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Cupola Furnace
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Thread cutting tap held in a tap wrench
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Die cutters and wrench handle
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Oil drilling rig Worker climbing an onshore oil drilling rig These are used when an initial survey has indicated the presence of oil The rig drills
RF
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A Greater spotted woodpecker tapping on a tree
ED
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Early refrigerator 19th-century artwork This domestic mobile icebox cabinet is mounted on six wheels Cool air is circulated from a pannier of ice (
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