US1915195A - Method of and machine for grinding in valves ...
Method of and machine for grinding in valves and cocks Download PDF Info Publication number US1915195A. US1915195A US402267A US40226729A US1915195A US 1915195 A US1915195 A US 1915195A US 402267 A US402267 A US 402267A US 40226729 A US40226729 A US 40226729A US 1915195 A US1915195 A US 1915195A Authority US …
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