… Coal gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous …
Explanatory notes
… 27.05 ‑ C oal gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous … gasification and also water gas, producer gas and similar gases, for example blast‑furnace gas. It also covers … e.g., methanol, ammonia. In the latter case, they are sometimes called “synthesis gas”. However, the heading …