| 摘要 |
The wall-section(1) is particularly for the construction of a manure pit, having portions(5,6) at opposite sides. Distance-pieces(11) between them are formed on one or both portions. These can be integral with the respective portion and can consists of humps spaced apart in the lengthwise direction. Where both portions have them, those on one can be offset from those on the other. The humps can be formed in recesses(9) in the one portion, into which protrusions (9) on the other one extend.
|
