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  2. Linear compressor - Wikipedia

    en.wikipedia.org/wiki/Linear_compressor

    The single piston linear compressor uses dynamic counterbalancing, where an auxiliary movable mass is flexibly attached to a movable piston assembly and to the stationary compressor casing using auxiliary mechanical springs with zero vibration export at minimum electrical power and current consumed by the motor. [4] It is used in cryogenics. [4]

  3. Freight forwarder - Wikipedia

    en.wikipedia.org/wiki/Freight_forwarder

    A freight forwarder is an entity who co-ordinates and organizes the movement of shipments on behalf of a shipper (party that arranges an item for shipment) by liaising with carriers. [3] A carrier is an entity that actually transports goods and may use a variety of shipping modes, including ships , airplanes , trucks , and railroads , including ...

  4. Cargo - Wikipedia

    en.wikipedia.org/wiki/Cargo

    However, air freight or air cargo shipments typically need to move at much faster speeds than 800 km or 497 mi per hour. While shipments move faster than standard LTL, air shipments do not always actually move by air. Air shipments may be booked directly with the carriers, through brokers or with online marketplace services. In the US, there ...

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  7. Walschaerts valve gear - Wikipedia

    en.wikipedia.org/wiki/Walschaerts_valve_gear

    The Walschaerts valve gear is an improvement on the earlier Stephenson valve gear in that it enables the driver to operate the steam engine in a continuous range of settings from maximum economy to maximum power. At any setting, the valve gear satisfies the following two conditions:

  8. General Electric J79 - Wikipedia

    en.wikipedia.org/wiki/General_Electric_J79

    The General Electric J79 is an axial-flow turbojet engine built for use in a variety of fighter and bomber aircraft and a supersonic cruise missile.The J79 was produced by General Electric Aircraft Engines in the United States, and under license by several other companies worldwide.

  9. Rail transport - Wikipedia

    en.wikipedia.org/wiki/Rail_transport

    A train in Alaska transporting crude oil in March 2006. Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in tracks, which usually consist of two parallel steel rails. [1]