Photo 1 of SGZ-200BS Portable Digital Turbidimeter Turbidimeter Nephelometer Tester with 0 ~ 200ntu 0.1

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Photo 1 of SGZ-200BS Portable Digital Turbidimeter Turbidimeter Nephelometer Tester with 0 ~ 200ntu 0.1Photo 2 of SGZ-200BS Portable Digital Turbidimeter Turbidimeter Nephelometer Tester with 0 ~ 200ntu 0.1