4. C - Chemistry, Metallurgy
  5. 10
  6. B

Charles Hayes

C - Chemistry – Metallurgy – 10 – B

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Coal carbonizing apparatus

C - Chemistry – Metallurgy – 10 – B
Patent

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Coal carbonizing process

C - Chemistry – Metallurgy – 10 – B
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Combined harrow and cultivator

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Conveyer

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Hoisting mechanism

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Patent

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Combined harrow and cultivator

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Patent

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Profile ID: LFCA-PAI-P-381309

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