| 摘要 |
The invention relates to a valve 2,7,3 peripherally fixed on the rim of the sink's bottom opening and extended therein to form thus a circular 4 cm-gap shaped by two conical parts of stainless metal or plastic material or of both metal and plastic material 9,10,11 of total length 28 cm. Embodiments: prevention of clogging of the drain piping by retention of foreign matter from water daily utilised for the washing of cooking equipment; saving of drinkable water since a great part of undesirablematter and substances can be removed by said filter from stored reusable washing water. |
