… or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape. …
Explanatory notes
… or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape. Slate, which … otherwise (e.g., with a wire strand), into blocks or slabs of a rectangular (including square) shape. Slate powder and … ground, polished, chamfered or otherwise worked. (b) Roofing, facing and damp course slates, even if shaped or …