27th January 1925, Page 30
27th January 1925
Page 30
Page 30, 27th January 1925
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Some New Valve-operating Gears.
A Résumé of Recently Published Patent Specifications. P A.POPPE, the rail . known designer of en. glues, describes in hie sped& c a tien No. 226,342, a new valve-operatin g......