| 摘要 |
There is described a device for a fish farm net pen, wherein there to a net bag (16) is fastened one or more positioning elements (1) arranged to be able to hold the net bag (16) in a prescribed position in a mass of water (3), and where the positioning element (1) is constituted by one or more elements (1') formed by at least one extrudable material having a specific weight decreasing in a direction from the surface (111) of the element (1') toward the core (112) of the element (1'). Also described is a method for manufacturing the positioning element (1). |
