inwall lining
1Inwall — In wall ([i^]n w[add]l ), n. An inner wall; specifically (Metal.), the inner wall, or lining, of a blast furnace. [1913 Webster] …
1Inwall — In wall ([i^]n w[add]l ), n. An inner wall; specifically (Metal.), the inner wall, or lining, of a blast furnace. [1913 Webster] …