| 摘要 |
PROBLEM TO BE SOLVED: To evenly drain regardless of a distance for preventing loss by improving the situation where the loss of water is significant because it comes out too much at the near place, and too little at the distant place, and is hard to be stopped. SOLUTION: A feed water pipe 2 provided with leak outlets 3 on its upper part and which assures a space is inserted in a waste pipe 1 provided with weepers 4. COPYRIGHT: (C)2003,JPO
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