Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 332
Fio. 300. … THE DUPLEX STEAM PUMP. The word duplex meanstwo fold, or double, and hasa wide application, as theduplex lathe, the duplexwatch, etc., hence, the well-known duplex-pump is one in which tivo direct acting^FiQ. 801. , J -J , J pumps are placed side by side and so connected that the steam piston of…
Hydraulic machinery · Pumping machinery
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