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71India Mark II — A broken India Mark II pump in rural Uganda A busy Mark II pump in Uganda. Children often bear th …
72Laser — For other uses, see Laser (disambiguation). United States Air Force laser experiment …
73Nickel-cadmium battery — Batteries caption=From top to bottom Gumstick , AA, and AAA NiCd batteries. EtoW = 40–60 Wh/kg EtoS = 50–150 Wh/L PtoW = 150W/kg CtoDE= 70%–90% [ [http://www.batteryuniversity.com/partone 11.htm Charging nickel based batteries ] ] EtoCP= ? US$… …
74Axial piston pump — An axial piston pump is a positive displacement pump that has a number of pistons in a circular array within a cylinder block. It can be used as a stand alone pump, a hydraulic motor or an automotive air conditioning compressor. Contents 1… …
75Auxiliaries (Roman military) — Auxiliaries (from Latin: auxilia = supports ) formed the standing non citizen corps of the Roman army of the Principate (30 BC ndash;284 AD), alongside the citizen legions. By the 2nd century, the auxilia contained the same number of infantry as… …
76Nickel–cadmium battery — From top to bottom – Gumstick , AA, and AAA Ni–Cd batteries. specific energy 40–60 W·h/kg energy density 50–150 W·h/L specific power 150& …
77Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
78Ocean thermal energy conversion — Temperature differences between the surface and 1000m depth in the oceans Ocean Thermal Energy Conversion (OTEC) uses the difference between cooler deep and warmer shallow or surface ocean waters to run a heat engine and produce useful work,… …
79Constructed wetland — Vertical Flow type of Constructed Wetlands A constructed wetland or wetpark is an artificial wetland, marsh or swamp created as a new or restored habitat for native and migratory wildlife, for anthropogenic discharge such as wastewater,… …
80Automotive lighting — Blinker redirects here. For other uses, see Blinker (disambiguation). Not to be confused with Magneti Marelli company AL Automotive Lighting. For lights in seafaring and aviation, see navigation light. The lighting system of a motor vehicle… …
