… shingle and flint, whether or not heat-treated; macadam of slag, dross or similar industrial waste, whether or not …
Explanatory notes
… shingle and flint, whether or not heat‑treated; macadam of slag, dross or similar industrial waste, whether or not … and flint, whether or not heat‑treated 2517.20 ‑ Macadam of slag, dross or similar industrial waste, whether or not … is composed of roughly graded crushed stones, pebbles, slag, dross or similar industrial waste, or intermixtures of …