( cavity walls)
A cavity wall is a wall that consists of two separate walls with a space between them. Cavity walls help to keep out noise and cold. ( mainly BRIT )
...cavity wall insulation.
N-COUNT : oft N n
( cavity walls)
A cavity wall is a wall that consists of two separate walls with a space between them. Cavity walls help to keep out noise and cold. ( mainly BRIT )
...cavity wall insulation.
N-COUNT : oft N n
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006