Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 29
ers of a duplex pump. Spring-seat. An elastic seat for a valve. 30 Pu7nps a7id Hydraulics. Steam thrown valves. Valves moved by steam only. Steam end of a pump. The end operated by steam. ^^Sticking of valves Inability to work caused by the in-troduction into the valves of sand, soil, etc.; or it… … Street Elbow.
Hydraulic machinery · Pumping machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
