MARINE ENGINES . 431 vertical type have a circulating pump worked directly off the piston , with an arm keyed on the bottom piston rod for taking the air pump rod ; two circulating and two air pumps are fitted , in other … Fig . 314 . — Vertical Arrangement properly arranged , inside condensation is suited for each Cylinder independeatly . a , Tube chamber . b , Air pump , to be preferred , as there is then some pos - c , Circulating pump . sibility of cleaning the tubes from lubri - cating matter carried over by the…
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