【摘要】 介绍了空中取样用的滤布１号、丝棉１号和丝棉２号等３种常用滤料，用风洞测定了它们的阻力特性，用火箭采集样品和用放射性气溶胶法测定了它们的过滤效率。更多还原

【Abstract】 Three general filter materials cotton cloth 1, silk floss 1 and silk floss 2 for air sampling are introduced. Their filter resistance characteristic were measured at a wind tunnel.The filter efficiencies were measured by means of the radioactive aerosol method and the cloud samples collected by the rockets.更多还原