1.Filter cartridges - Test methods - Determination of the mass of extractible materials by measuring the dry extract.
过滤盒。试验方法。通过测量干抽提取物对可抽取物质量的测定。
2.soil quality . chemical methods . determination of cationic exchange capacity and extractible cations.
土质。化学方法。阳离子交换容量和可交换的阳离子的测定。