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Identifying and quantifying the presence of alpha radiation and specific gaseous molecules present in air samples
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Detector for contaminated air in dwelling
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Device for radon detection of contaminated air in dwellings
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Radon control in dwellings
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Radon detector
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Computer controlled air conditioning systems
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Energy efficient building with underground concrete walls
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Means and method of sensing motor rotation speed from stray escaping flux
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Solar energy collector system
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Energy saving electrically actuated barrier gate control means operable from solar energy
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Solar energy collector system
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Heat storage systems
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