..., sand and stones during construction. During the renovation, due to the numerous pipes buried too deep in the floor, once the pipes are blocked, they have to be demolished in a large area, which consumes a lot of labor and financial resources. Using this
..., sand and stones during construction. During the renovation, due to the numerous pipes buried too deep in the floor, once the pipes are blocked, they have to be demolished in a large area, which consumes a lot of labor and financial resources. Using this more
