Pond Chemical Pharmaceutical Food Water Acid-Base Tester PHB-4 with Flat Head Electrode Measuring Dough

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Qiwei PHB-5 PH meter Dough Steamed Bread Alkali Meter pH Digital display acid and alkali device (with flat head electrode)

Qiwei PHB-5 PH meter Dough Steamed Bread Alkali Meter pH Digital display acid and alkali device (with flat head electrode)

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Qiwei PHB-5 portable pH meter pen acid-base concentration high-precision tester with composite electrode

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