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Sheffield H. Wright Improvement in Machines for Threading Bolts - DPLA - 3e71ffda9ad1daae2a55352bf64826eb (page 1)

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Sheffield H. Wright Improvement in Machines for Threading Bolts - DPLA - 3e71ffda9ad1daae2a55352bf64826eb (page 1)

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03/10/1871
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Public Domain

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