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JP2006199253A
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Backward negative pressure eliminating device for travelling vehicle
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JPS60203701A
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Road heating method only by ground water
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JPS60174457A
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Method of long term underground heat accumulation
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JPS60152736A
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Pumping-up and irrigation well
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Production of underground storage tank
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JPS59225251A
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Room heating installation utilizing heat in earth stored
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Geothermal heating system by ground heat accumulation
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JPS57165504A
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Snow melting system
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JPS56133096A
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Methane gas generator for night soil
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JPS51120418A
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Construction of heat storage water tank
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