100Pcs W-14 Water Quality Analysis Strip 14-in-1 Quick Testing PET Instant pH Hardness Test Paper for Drinking Water pH Hardnes

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1

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1

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3

5.0

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1

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2

5.0

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3

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1

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1

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2

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5.0

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1

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-6%

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1

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0

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1

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1

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1

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3

8

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0

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0

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1

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1

5.0