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Refillable Ethylene Gas 99.95% 16kg C2h4 Ethylene Gas in 50L 200bar ISO 9809-1 Standard Gas Cylinder, Find Details and Price about 99.95% Ethylene Gas Cylinder 50L C2h4 Gas Tank from Refillable Ethylene Gas 99.95% 16kg C2h4 Ethylene Gas in 50L 200bar ISO 9809-1 Standard Gas Cylinder - Qingdao Forterra Gas Co., Ltd