… gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous hydrocarbons. …
Explanatory notes
… gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous hydrocarbons. Coal gas is … of gases formed by cracking or reforming of mineral oils, petroleum gases or natural gases, usually in the presence of … lighting purposes and in the synthesis of chemicals, e.g., methanol, ammonia. In the latter case, they are sometimes …