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Pumps and hydraulics (1905)
Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 17
Ball Check-Valve. Bibb-cock. This is a plug cock having an elbow or curved out-let directing the outflow downward.Hydraulic machinery · Pumping machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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