… or crushed stone, of a kind commonly used for concrete aggregates, for road metalling or for railway or other …
Explanatory notes
… or crushed stone, of a kind commonly used for concrete aggregates, for road metalling or for railway or other … for road metalling or for railway track or other ballast. Segregated materials of construction and demolition waste … an abrasive material. Other shingle is used in ball mills (e.g., for grinding lime, cement, etc.) or for road …