Model of worm and rack valve, c.1870.

Model of worm and rack valve, c.1870.

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Model of worm and rack valve, c.1870.
Science Museum Group
© The Board of Trustees of the Science Museum

Model of worm and rack valve, c.1870.

Details

Category:
Gas Industry
Object Number:
1952-248
type:
valve, model
credit:
Bryan Donkin Co. Ltd.