are welded together

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• Track (rail transport) — Permanent way redirects here. For other uses, see Permanent way (disambiguation). Twin rail tracks in a wooded area …   Wikipedia

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• Pattern welding — is the practice in sword and knife making of forming a blade of several metal pieces of differing composition that are forge welded together and twisted and manipulated to form a pattern. Often incorrectly called Damascus steel (which is produced …   Wikipedia

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• ship construction — Introduction       complex of activities concerned with the design and fabrication of all marine vehicles (ship).       Ship construction today is a complicated compound of art and science. In the great days of sail, vessels were designed and… …   Universalium

• pipeline — /puyp luyn /, n., v., pipelined, pipelining. n. 1. a long tubular conduit or series of pipes, often underground, with pumps and valves for flow control, used to transport crude oil, natural gas, water, etc., esp. over great distances. 2. a route …   Universalium

• Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …   Wikipedia

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