| 摘要 |
PROBLEM TO BE SOLVED: To provide an environmental conservation technology with lesser burdens for installation compared to conventional technologies and is highly adaptive to rugged topography.SOLUTION: An environment-conserving roll-shaped filter includes a wound body formed by rolling a net and a sheet-form filter overlapped on the net, keeping the sheet-form filter inside the net, and a prescribed infilling material filled between the sheet-form filter and the net that is in contact with the inner surface of the sheet-form filter of the wound body. The would body filled with the infilling material has a smaller diameter at both ends than at the center, in the direction of the winding axis. |
