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U.S.P.O. i.e., U.S. Post Office differential pressure valve

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U.S.P.O. i.e., U.S. Post Office differential pressure valve

description

Summary

Drawing.
This record contains unverified data from caption card.

Public domain photograph of French architecture design drawing, building plan, Paris, France, free to use, no copyright restrictions image - Picryl description

date_range

Date

01/01/1852
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Source

Library of Congress
copyright

Copyright info

No known restrictions on publication.

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