| 摘要 |
Base hydrocarbon gas, preferably LPG gas, is fortified with 6 % to 20 %, preferably 10 % to 15 %, of methyl ethyl ketone, with activated carbon as a catalyst to make an azeotropic mixture. Cutting of ferrous metal can be accomplished even under water by mixing the fortified torch gas with oxygen having a purity as low as 90 %. |
