| 摘要 |
PROBLEM TO BE SOLVED: To provide an invasion-preventing method for preventing the invasion of beasts, and to provide a vegetation structure. SOLUTION: A growth base 3 for growing plants is formed on a slope, and then covered with a covering material 4. A wire net 5 is laid on the covering material 4. Coil springs 6 are disposed between the covering material 4 and the wire net 5. When the wire net 5 is stepped with breasts, the coil springs 6 are bent with the loads of the breasts to float or sink the wire net 5. COPYRIGHT: (C)2005,JPO&NCIPI
|
