| 摘要 |
PROBLEM TO BE SOLVED: To provide a float to be placed on the surface of a river or a lake after plants are stuck into it, enabling the easy construction, keeping the landscape of nature in an excellent state and well considered for water purification and ecosystem by covering a foam with a material having an adequate strength and elasticity. SOLUTION: A foam is covered with a polyurethane elastomer having an adequate strength and elasticity, etc. Further, floats 3 have connecting means 7, 9 for connecting both floats to each other, and a cover 5 for preventing the passage of roots of a plant is attached below the float 3 with a specified space from the lower surface of the float 3. |
