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TDS Meter, Water Quality Teste， Portable Professional LCD TDS-3 Meter, 0-9990ppm High Accuracy Pen Type Water Quality Tester for Household Drinking Water, Aquarium,Swimming Pools,Hydroponics https://youtu.be/lU7N-Kf9j_E, 寵物用品, 寵物家品及其他-
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HM Digital COM-360 Waterproof Professional Series pH/EC/TDS/Temp Meter
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