Nitrous Oxide, Helium Gas, Ethylene Gas manufacturer / supplier in China, offering Low-Spatter Argon Gas for Thin Metal Sheet Welding - Clean Bead Formation, 20L/30L Lightweight Cylinders for Workshops, Portable Argon Gas Kit for Field Repairs & Mobile Welding - Lightweight 5L/10L Backpack Cylinders with Shoulder Strap, Pre-Mixed Argon-Helium Gas for High-Temperature Welding - Custom Ratios, 30L/60L Tanks with Composition Certificate and so on.