30th July 1929, Page 70
30th July 1929
Page 70
Page 70, 30th July 1929
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A Novel Form Of Valve Mechanism
A Wsurne of Recently Published Patent Specifications. T IlE valve-actuating mechanism described in specification 1 No. 314,217 by F. W. Giles, of Trimpley, Woodfield Avenue,......