Slide-valve
noun, Machinery.
1.
a valve that slides without lifting to open or close an aperture, as the valves of the ports in the cylinders of certain steam engines.
noun
1.
a valve that slides across an aperture to expose the port or opening
2.
(modifier) fitted with slide valves: a slide-valve engine
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adjective 1. rising or falling, increasing or decreasing, according to a standard or to a set of conditions. 2. operated, adjusted, or moved by sliding: a sliding door. verb (used without object), slid [slid] /slɪd/ (Show IPA), slid or slidden [slid-n] /ˈslɪd n/ (Show IPA), sliding. 1. to move along in continuous contact with a […]
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noun 1. (engineering) frictional resistance to relative movement of surfaces on loaded contact Compare rolling friction