Hold International Group Co., Ltd

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Fixed ozone(O3) gas detector OC-F08	Fixed Chlorine Dioxide (ClO2) Gas Detector OC-F08	Portable pump-suction O2 gas detector OC-903	Sulfate Detector/Water Quality Detector
Portable pump-suction CL2 gas detector OC-905	Gas leakage detector, KT-606	Portable acetaldehyde (C2H4O) gas detector OC-904	Automobile Exhaust Gas Analyzer, OC-501
Portable pump-suction O2 gas detector OC-905	Portable combustible gas detector OC-904