| 摘要 |
<p>A variable diameter tube (10) for use with a roller pump (28) which is formed with a central large diameter section that is positioned in the roller pump raceway (30, 32). This tube (10) is formed with two end portions of substantially similar internal diameter with the diameter of the tube gradually increasing towards the central section. The gradual increase in diameter is no greater than about thirty degrees per inch and the wall thickness of the tubing wall is substantially equivalent along its entire length.</p> |
