A <a href="http://www.phpfluid.com/piston-pump/" target="_self">piston pump & motor</a> is a type of reciprocating pump that moves and pressurizes fluid by using one or more reciprocating pistons; it is typically driven by an electric motor through a crankshaft and connecting rod. Though there are many types, all piston pumps feature at least one piston moving in an enclosed cylinder.
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