标准号:IS 9690-1980
发布日期:1981/4/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This standard covers the procedure for measuring the relative degree of openness or fiberization of milled chrysotile asbestos fibre by air permeability. Samples containing excessive quantities of non-fibrous particles or contaminants will not give reliable or meaningful results.