| 摘要 |
The decompsn. occurs by biological breakdown without chemical additives. - The lower part of the decompsn. chamber has a cartridge filter arranged at or above the bottom. The cartridge comprises filter material surrounded by a perforated cover. It extends through the walls and has openings at its ends through which liquid can be removed. The seat cover is held fast on the seat by the curved device so that it can be swung from a closed to a stable open position. |
