| 摘要 |
The invention concerns a filter cloth 2 of essentially flexible material, such as rubber, plastic or the like, designed for sifting of rocks, sand, lime, dirt, ore, coke, coal, etc. The sifting hole 4 has at its edge a slit in the material of the filter cloth, which releases a portion 8 of the edge to enable its elastic movement when in use, transverse to the plane of the filter cloth, relative to another edge part. <IMAGE> |
