... surfaces give a high efficiency vehicle for gas-liquid contact with good mechanical strength.Metal cascade mini rings,preferential orientation in ... 1715700159105983P0.466×211014016510897.94P0.486×2843101207898.5 Proporties1.Compared with the Metal pall ring of gas fluxes increase 10%-20% reduced pressure ... ,304,304L,316,316L chemical tower packing:metal cascade mini ring with Increased plant efficiency