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发表于 25-12-2014 11:34 AM
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从NSF certified 角度去选择过滤器, 至少有NSF standards 42, 53, and 55。
P/S NSF =Established nearly 60 years ago, NSF International is an independent, objective, not-for-profit testing and certification agency that sets global performance standards for a wide variety of home and industrial products. NSF is accredited by ANSI (American National Standards Institute) as an ISO 9000 and QS-9000 registrar |
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