Elementary lessons in steam machinery and the marine steam engine, with a short description of the construction of a battleship (1893)
Langmaid, Joseph, Gaisford, H · London, New York : Macmillan · leaf 207
s G. In order that the packing ring may be free to bepressed against the cylinder it is cut across, and to prevent steampassing through the space a tongue piece T is fitted. In horizontal engines the pistons are fitted with a filling piece,which takes the place of some of the springs at the bottom.… … Tongue Piece.
Steam-engines · Marine engines
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