HOPKINSONS’
PATENT
VALVES
AND
STEAM TRAPS
“PLATNAM” VALVES AND SEATS
“ PLATNAM ” IS A HARD, CLOSE GRAINED ALLOY, WHICH IS PRACTICALLY INDESTRUCTIBLE, MAKING IT THE IDEAL METAL FOR VALVES AND SEATS
HOPKINSONS LIMITED
HUDDERSFIELD
LONDON: 34, NORFOLK STREET, STRAND, W. C. 2
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