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Piston valve: No. 13971. Supponent.06/13/1905.Issue 07/21/1908 / h.A.Parsons.- [B.M .: B. and., 1908].-3319-3320 p., 1 liter.Il .. -Description of the piston valve.To the privilege of a foreigner Ch.A.Parsons (Ch. A. Parsons), in the city of New Cestle, in England, declared on June 13, 1905 (okhr. St. No. 27006).Group III.No. 13971. July 21, 1908.I. Parsons, h.a..1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS
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| Publisher | б. и. |