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Downward-flowing Granular Solids as Pressure Seals in Vertical Standpipes

J. J. DemeterW. P. Haynes

出版	U. S. Department of the Interior, Bureau of Mines, 1960
URL	http://books.google.com.hk/books?id=_5EAywEACAAJ&hl=&source=gbs_api