| 摘要 |
<p>The drain has a cylindrical central trunk (1) for forming an ellipsoidal portion with a maximum section, and a node divided into branches (2, 3), where the drain is made of a flexible material or flexible plastic material e.g. silicone. Sum of surfaces of sections of the branches is equal to the section of the trunk portion. The trunk is divided by radial partitions rejoin at the level of an axis of the trunk.</p> |
