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Chainsaw — For other uses, see Chainsaw (disambiguation). An arborist using a chainsaw to fell a eucalyptus tree A chainsaw (or chain saw) is a portable mechanical saw, powered by electricity, compressed air, hydraulic power, or most common … Wikipedia
Differential (mechanical device) — For other uses, see Differential. A cutaway view of an automotive final drive unit which contains the differential Input … Wikipedia
List of John Deere tractors — Deere Company, the firm founded by John Deere, began to expand its range of equipment to include the tractor business in 1876. The Deere Company briefly experimented with building its own tractor models, the most successful of which was the Dain… … Wikipedia

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