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Force changer of water power generation device
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Structure installation of dedicated chain belt in use for perpetual motion machine of potential energy
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Chain wheel structure device of automatic changing potential energy moment
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Control apparatus for automatic dam-isolation water-suction generating
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Control device for water-storing tank force-intensifying efficient generating electricity
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Silencing, environment-friendly combined steel-plastic protection hood for air conditioner
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Programmed controller capable of automatically cutting off front and rear gate valves of broken oil-gas transportation pipeline
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Distribution valve for array-controlled spraying extinguisher
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Enclosing array controller for preventing coal mine gas from explosion
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Array controller for grouped spraying surrounding fire extinguishing
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Highly effective fire-extinguishing water gun with water-spraying umbrella protecting body and keeping off fire
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Automatic control mechanism of water way for indoor fire-extinguishing device
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