它能有效隔离水中不溶解物质如霉菌、原生虫，微生物，细菌和病毒，同时保留水中矿物质和杀菌的游离氯。
It helps to remove un-dissolved impurities, such as harmful mould, protozoan, bacteria and virus effectively while preserve the minerals and chlorine in the water.
风化物：碎屑物质、溶解物质和不溶残余物质。
Products of weathering: clastic particle, soluble materials and residue.
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