| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily measurable water-quality pollution prevention fence, capable of measuring the effect without impairing the pollution prevention function, easy in collecting an effect measuring sample, also excellent in working efficiency, and clear in a comparison of the effect measuring sample.SOLUTION: A water-quality pollution prevention fence is constituted of a fence part 10 having a float 11 and a fence sheet 12 suspended by the float, a measurement sheet 20 mutually oppositely out-fittable to both surfaces of the fence sheet in a part of the fence part and a pull-up rope 25 connected to the measurement sheet.SELECTED DRAWING: Figure 2 |
