| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain apparatus having a simple structure, good necessary drain efficiency, and no fear of deformation because used in a fixed state without being rotated and also easy to wash. SOLUTION: A screen 3 is constituted by arranging wedge wires 6 having a triangular cross section so that the minimum mesh width 7 is provided between the wires and the triangular apexes 6a of the wires are positioned outside to form a vertical arcuate plate having an inside recessed surface 4. |
