chromium hexavalent Ntuziaka nhọrọ: Akụrụngwa enwere ike ibugharị Q-Cr6 Hexavalent Chromium nwere agba agba T-CP40 obere agba agba maka mmiri ọñụñụ T-6800 Multi-parameters Portable Colorimeter Ngwa ụlọ nyocha Z-T700 nwere ọgụgụ isi Multi-parameters Analyzer Z-D700 Multi-parameter Analyzer TA-60 nwere ọgụgụ isi Multi-ọrụ Water Analyzer TA-98 UV Spectrophotometer a na-ahụ anya
