Two examples of Thompson's airpump valves

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Two examples of Thompson's airpump valves: (a) Convex; (b)
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© The Board of Trustees of the Science Museum

Two examples of Thompson's airpump valves: (a) Convex; (b) Annular type

Details

Category:: Motive Power

Object Number:: 1899-4

type:: valve

credit:: Stevens and Struthers

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Two examples of Thompson's airpump valves

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