DGB-422 Portable multiparameter Water Quality Analyzer's video
NBCHAOVIDEO32 plays · · 2020-08-13
LEICI DGB-428 Optoelectronic Colorimetry Water Quality Analyzer Measurement parameters Water Hardness, Urea, Measuring method Water Hardness: Calcium mg reagent method; Urea: Diacetyl-Oxime-Antipyrine Spectrophotometric method, spec-trophotometry
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