REFRACTORY BRICK

摘要

An assemblage of octagonal prismatic refractory bricks having matching central tetragonal bores 12, wide side faces 10 and narrow side faces 11. The top face has raised sections 16 and recessed sections 14 and the bottom face has similar sections complementary to the sections on the top face. The steps 17 between each section make the same angle with an imaginary line drawn radially from the centre of bore 12. The face of the step 17 between each section forms a bevel between raised section 16 and recessed section 14.