Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 273
ethe piston steam-tight, various forms of spring rings are used, which,while rendering the piston steam-tight, also set up more or lessfriction against the cylinder walls during the stroke of the piston. The packing-rings of pistons have themselves an initial spring ortendency to open themselves…
Steam-engines
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