| 摘要 |
PROBLEM TO BE SOLVED: To control temperature rising on the surface of the sea to shorten a drainpipe. SOLUTION: The heated water is led in the water side by piping 7, at the same time, in a drainage system of the heated water for draining the heated water led in the water side from the piping 7 in the water as the outside of the piping 7, a plurality of drainage sections 9 for draining the heated water in the water as the outside of the piping 7 from the piping 7 are provided in the piping 7.
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