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| Feature | Traditional Gas Welding | Oxy-hydrogen Gas Welding |
| Fuel | Acetylene /LPG | Water + electricity |
| Flame type | Radiating | Straight |
| Residue | Carbon soot | Clean, zero-carbon |
| Safety | High pressure gas cylinders | On-demand production, no storage |
| Operation cost | High (gas refills, logistics) | Low (water + power only) |