ICS83.100G44B中华人民共和国国家标准GB/T18945-2003idt1S07231:1984高聚物多孔弹性材料恒定压力降时流量的估算方法Polymeric materials,cellular flexible-Method ofassessment of air flow value at constant pressure-drop2003-01-10发布2003-07-01实施中华人民共和国国家质量监督检验检疫总局发布
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