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Prior to 1945 there was no demand for multi-system locomotives in Europe. From the 1950s onwards, the emerging formation of the European Union, and the consequent increase in the amount of cross border traffic, along with the addition of a 25 kV 50 Hz AC system in France in addition to the older 1.5 kV DC system, gave rise to the need for multi-voltage locomotives. [2]
Hydraulic exercise equipment is a form of strength training equipment based on fluid dynamics to provide motion resistance by use of hydraulic cylinders. They can be used in a number of strength training programs, and are most often found in circuit training gyms.
Pages in category "Multi-system locomotives" The following 44 pages are in this category, out of 44 total. ... This page was last edited on 2 April 2018, ...
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
A gear train or gear set is a machine element of a mechanical system formed by mounting two or more gears on a frame such that the teeth of the gears engage.. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. [2]
The multi-stage fitness test was first described by Luc Léger [6] with the original 1-minute protocol, which starts at a speed of 8.5 km/h, and increases by 0.5 km/h each minute. Other variations of the test have also been developed, where the protocol starts at a speed of 8.0 km/h and with either 1 or 2-minute stages, but the original ...
The Army Physical Fitness Test (APFT) was a test designed to measure the muscular strength, endurance, and cardiovascular respiratory fitness of soldiers in the United States Army. The test contained three events: push-ups, sit-ups, and a two-mile run with a soldier scoring from 0 to 100 points in each event based on performance. A minimum ...
Power training frequently specifically utilises two physiological processes which increase in conjunction with one another during exercise. These are deep breathing, which results in increased intra-abdominal pressure; and post-activation potentation, which is the enhanced activation of the nervous system and increased muscle fibre recruitment.