| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an innovative method for repairing a drain ditch capable of exerting an unprecedented action effect. <P>SOLUTION: In an innovative method for repairing a drain ditch, side wall parts 1a are suspended on left and right sides of a top wall part 1d having an opening window 1e, and a cross-sectional inverted U-shaped drain ditch block 1 which is provided with a cover body placing stepped part 1c for placing a cover body 4 thereon at opposite left and right inner sides of the opening window 1e is laid to form the drain ditch. <P>COPYRIGHT: (C)2013,JPO&INPIT |
