Explanatory notes
… ‑ Snow‑ploughs and snow‑blowers ‑ Coal or rock cutters and tunnelling machinery : 8430.31 ‑ ‑ Self‑ … the terrain (e.g., scraping, levelling, grading, tamping or rolling). It also includes pile‑drivers, pile‑extractors, … into a train running on a railway network of any gauge. Railroad ballast excavator‑screening machines are often mounted …