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[edit] Transport

[edit] Marine Propulsion Systems
Combined gas turbine and gas turbine ( COGAG)
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[edit] Electronics
[edit] Computing science
1 Write-protect tab. 2 Hub. 3 Shutter. 4 Plastic housing. 5 Paper ring. 6 Magnetic disk. 7 Disk sector.
[edit] Electricity
An example of a secondary cell.
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Hydroelectric power plant
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A coal-fired thermal power station.
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[edit] Petrol
[edit] Geothermal power
Geothermal energy methods
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[edit] Machinery
[edit] Military
[edit] Spacecraft
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