25th June 1914, Page 32
25th June 1914
Page 32
Page 32, 25th June 1914
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Patents Completed.
Pneumatic Wheel. Preventing Valve-stem Leakage. Vickers' Piston-rings. A. SANG, No. 342, dated 6th January, 1914.—The wheel described in this specification has an air tube......