Piston air valves increase capability
World pumps ; 494
2007
Article (Journal)
English
Engineering Index Backfile | 1900
|Engineering Index Backfile | 1899
|Locomotive with piston valves -- Norfolk and Western railway
Engineering Index Backfile | 1898
Electromagnetic valves increase engine efficiency
British Library Online Contents | 1997
New application of piston valves to slide valve cylinders
Engineering Index Backfile | 1920
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