pswr
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Standing wave ratio — In telecommunications, standing wave ratio (SWR) is the ratio of the amplitude of a partial standing wave at an antinode (maximum) to the amplitude at an adjacent node (minimum), in an electrical transmission line. The SWR is usually defined as a … Wikipedia
List of United States railroads — See also: List of Canadian railways There are approximately 150,000 miles (240,000 km) of railroad track in the United States, nearly all standard gauge. The following is a partial list of United States railroads which currently operate there.… … Wikipedia
New York, Susquehanna and Western Railway — Reporting mark NYSW Locale New York, New Jersey and Pennsylvania … Wikipedia
List of Pennsylvania railroads — The following railroads operate in the U.S. state of Pennsylvania.Common freight carriers*Aliquippa and Ohio River Railroad (AOR) *Allegheny Valley Railroad (AVR) *Belvidere and Delaware River Railway (BDRV) *Brandywine Valley Railroad (BVRY)… … Wikipedia
Watco Companies — Watco Companies, based in Pittsburg, Kansas, is a holding company of several short line railroads in the United States:* Alabama Southern Railroad (ABS) * Arkansas Southern Railroad (ARS) * Austin and Western Railroad (AWRR) * Eastern Idaho… … Wikipedia
Maryland Midland Railway — Reporting mark MMID Locale Carroll and Frederick Counties, Maryland Dates of operation 1980– T … Wikipedia
New Hope and Ivyland Railroad — Reporting mark NHRR Locale Bucks County, Pennsylvania Dates of operation … Wikipedia
Octoraro Railroad — Reporting mark OCTR Locale Chester County, Pennsylvania Dates of operation 1980s–1994 Predecessor Conrail Successor Delaware Valley Railroad … Wikipedia
North Shore Railroad (Pennsylvania) — For other uses, see North Shore Railroad (disambiguation). North Shore Railroad Reporting mark NSHR Locale Pennsylvania … Wikipedia
Nittany and Bald Eagle Railroad — Reporting mark NBER Locale Pennsylvania Dates of operation 1984– Track gauge … Wikipedia
Middletown and Hummelstown Railroad — Reporting mark MIDH Locale Dauphin County, Pennsylvania Dates of operation 1976– Track gauge 4 ft 8 1⁄2 in (1,435 mm) ( … Wikipedia
