Compressing A One-Atom Gas
Shows velocity change of a particle when a piston compresses and expands a narrow cylinder.
http://galileo.phys.virginia.edu/classes/109N/more_stuff/Applets/Piston/jarapplet.html

Bergner Metalurgica
Manufacturer of compressor (piston type) spare parts: Valves, piston rod packings, scraper rings, PTFE piston rings, for Ateliers Francois, ABC, Belliss and Morcom and other compressors.
http://www.bergner.com.ar/

Burckhardt Compression
Burckhardt Compression - Your partner for reciprocating compressors: labyrinth piston compressors, process gas compressors (API618), hyper compressors, quality compressor components, condition monitoring and all services.
http://www.burckhardtcompression.com

National Cylinder Head Exchange
Shop in Florida for cylinder heads or rebuilt engines. Since 1971 that is what we specialize in at National Cylinder Head Exchange. Free performance camshaft upgrades!
http://www.nationalcylinderhead.com

Cyl-Tec, Inc.
Cylinder products and services, including cryogenic cylinder maintenance,repair, testing, and sales. In Aurora, Illinois.
http://www.cyl-tec.com/

Orbiting Piston
Patented, innovative rotary internal combustion engine which orbits instead of rotates and has piston like chamber action. Includes theoretical and technical background, specifications, diagrams and patent.
http://home.woh.rr.com/opengine

Suburban Cylinder Express
Propane cylinder delivery company specializing in bottle exchange services for grills, outdoor heaters, and mosquito control.
http://www.grill-on.com/

Piston-rings.eu
Offers piston rings for vehicles and industrial engines. Includes product catalogue and company profile.
http://www.piston-rings.eu

Dynex/Rivett Inc.
A profile of Dynex/Rivett and its high pressure hydraulic products rated from 6000 psi (420 bar) to 20,000 psi (1400 bar), including hydraulic piston pumps, power units, hydraulic valves, hydraulic piston and vane motors, electrohydraulic controls and hydraulic actuators.
http://www.dynexhydraulics.com/

J & J Air Parts, Inc.
Provides cylinder repair services, piece parts, new cylinder assemblies and accessories to the general aviation industry.
http://jjairparts.com