| 摘要 |
A liquid retention device comprises a braced frame mountable on foundations in a plurality of locations. The device comprises a base section and at least one upstanding support, and said brace further comprises height-adjusting means for adjusting the height of said frame. The device further comprises a face supported by said frame, the face being inclined at an angle to the at least one upstanding support, and the face is covered by a least one detachable mat. |
