Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 218
Fia. a)L 220 Pumps and Hydraulics. Air chambers are placed upon the top of a pump, see Figs. 199 and 200, and contain air for the purpose of introducing anair cushion to counteract the solidity of the water, thus prevent-ing shocks as the water flows through the valves; and also forthe purpose of…
Hydraulic machinery · Pumping machinery
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