Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 379
ed, that during the hauling up, thecarriage is prevented from falling back by means of three or more pawls at different parts of the fram-ing, working on the rack on the midway. The launching of a vessel from the slip takes place very easily, by putting the cross-pieces and chock-blocks under her…
Mechanical engineering
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