… gas and similar gases, other than petroleum gases and other gaseous hydrocarbons. …
Explanatory notes
… gas and similar gases, other than petroleum gases and other gaseous hydrocarbons. Coal gas is obtained by the distillation of coal in the absence of air, usually in gas works or coke ovens. It is a complex mixture of hydrogen, methane, carbon monoxide, etc., and is used for lighting or heating purposes. The heading includes …