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美国政府科技报告
>INVESTIGATION OF THE FEASIBILITY OF USING WINDPOWER FOR SPACE HEATING IN COLDER CLIMATES Third Quarterly Progress Report Covering the Final Desing and Manufacturing Phase of the Project, September-December 1975
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INVESTIGATION OF THE FEASIBILITY OF USING WINDPOWER FOR SPACE HEATING IN COLDER CLIMATES Third Quarterly Progress Report Covering the Final Desing and Manufacturing Phase of the Project, September-December 1975