| 摘要 |
<p>A filter panel is made up of a rigid supporting frame containing polygonal elements with the elasticity of rubber, fitting against each other to form a continuous surface. Projecting luggs on the elements by which they are held in position are tubular sectors (10) cut longitudinally those of adjacent elements together forming holes. Anchoring pins (16) expand these sectors below the frame grille bars to hold the elements together.</p> |
