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3-in-1 Gas Detector Multi-Function Multi-Gas Fixed Ethylene Trimethylamine Methyl Sulfide C2h4 C3h9n C2h6s Detection Alarm, Find Details and Price about C2h4 Detector C2h4 Gas Detector from 3-in-1 Gas Detector Multi-Function Multi-Gas Fixed Ethylene Trimethylamine Methyl Sulfide C2h4 C3h9n C2h6s Detection Alarm - Shenzhen Yifan Technology Co., Ltd.