| 摘要 |
A device for exhibiting fouling substrates comprises a rod, a substrate, grooves and supporting elements. At one end of a vertical rod, screw blades of deepening up to the soil on which the substrate, arranged between the supporting elements, shaped as ellipse disks with grooves on surface thereof, is placed thereon by blocks along longitudinal axis thereof. In doing so each ellipse disk is arranged on the vertical rod at angle α to the horizontal axis equal to 20÷25°. |
