MODERN STEAM PRACTICE . 58O the valve rods acting as guides in maintaining a true line of action . Tn other arrangements there is only one door at the front , while at the back the stuffing box for the valve rod is cast along with the … Figs . 434 , 435 . — Cylinders . a a , Cylinders . b , Valve . c c , Steam ports . d d , Exhaust passages . e , Regulator and ehest . f , Back cover . g , Stuffing box for the valve rod . h , Guide piece for the valve rod . 1 , Front cover . k k , Main frames . cylinder . The front cylinder cover…
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