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A valve job is the colloquial term for resurfacing the mating surfaces of the poppet valves and their respective valve seats that control the intake and exhaust of the air/fuel mixture in four stroke internal combustion engine, replacing valve oil seals, replacing any deficient valve springs, and otherwise bringing the components of a cylinder head up to manufacturer’s spec. [1] A ...
Lapping machine. Lapping is a machining process in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine. Lapping often follows other subtractive processes with more aggressive material removal as a first step, such as milling and/or grinding. Lapping can take two forms.
Loram provides maintenance of way services to Class I and shortline railroads, rapid transit systems, and commuter rail systems [2] worldwide. [6] The Railway Supply Institute said in 2015 that Loram was "one of the leading suppliers of track maintenance machinery and services in North America and the global market". [2]
An abrasive flow machine normally includes two medium chambers equipped with hydraulic rams, a fixture for holding the workpiece, and a clamping system that holds all the components tightly together. [ 3 ] [ 1 ] Most machines allow for the loading of different types of abrasive medium, and include the capacity to adjust the pressure used in ...
The following is a list of all light rail systems in the United States. Also included are some of the urban streetcar/trolley systems that provide regular public transit service (operating year-round and at least five days per week), ones with data available from the American Public Transportation Association's (APTA) Ridership Reports.
The other main activity for which specially designed Speno trains are used is measuring and inspecting railway tracks. With these trains the tracks can be inspected in "real time" while the train runs over the tracks: with video, infra-red recorders, acceleration equipment and other high-tech measuring tools the quality of the rails and points is monitored and recorded.
A light rail transit (LRT) system is an urban rail transit system with a "light" passenger capacity compared to heavy rail and metro systems. Its operating characteristics are that it uses railcars , called light rail vehicles (LRVs), operating singly or in short multiple unit trains on fixed rails in a right-of-way that is not necessarily ...
The San Diego Trolley, the most heavily used light rail system in the United States. Light rail is a mode of rail-based transport, usually urban in nature. Light-rail systems are typically designed to carry fewer passengers than heavy-rail systems like commuter rail or rapid transit (subway).
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