Plastic valve sizing calculating rule by Short & Mason Ltd.

Made:
1955-1970 in London
maker:
Short and Mason Limited

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Plastic valve sizing calculating rule by Short & Mason Ltd., 1955-70.

Details

Category:
Mathematics
Object Number:
1999-712
Materials:
complete and plastic
Measurements:
overall: 3 x 165 x 51 mm
type:
ready reckoner (engineering)
credit:
Mr G. J. Betts