| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake and discharge pipe using flexible high-density polyethylene-made pipe dispensing with corrosion treatment, and allowed to be laid under the sea regardless of buoyancy, an ocean current and a tide. SOLUTION: This intake pipe 11 is formed of material, the specific gravity of which is controlled to 1.0 to 1.5 by adding a filler to high density polyethylene.
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