| 摘要 |
PCT No. PCT/JP86/00013 Sec. 371 Date Sep. 12, 1986 Sec. 102(e) Date Sep. 12, 1986 PCT Filed Jan. 14, 1986 PCT Pub. No. WO86/04101 PCT Pub. Date Jul. 17, 1986.The invention provides a material useful as a slope face protective material for use in civil engineering work or the like, as a water contact material or a filter material for forming biological films for use in biological water treatment by an aeration or nonaeration process, and a material for underwater nurseries for growing laver or like vegetables, artificial fish-breeding shelters, hydroponic culture beds, etc. The material includes at least one sheet having predetermined flexibility and rigidity and at least one rope attached in a wavelike form to the sheet, the sheet having a plurality of incisions which are openable when the rope is stretched from the wavelike form to deform the sheet and form a multiplicity of flaps raised with respect to the axis of the rope.
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