| 摘要 |
<p>A valve has valve bodies (1, 2), a tube (3) of an elastic material, extending through the valve bodies, and a roller (23) and a pressing surface (14) that are oppositely arranged with the tube (3) in between. When the roller (23) is caused to approach the pressing surface (14), the tube (3) is crushed between the roller (23) and the pressing surface (14) to close a flow path in the tube (3). When the roller (23) is moved along the tube (3), a crushing position where the roller (23) and the pressing surface (14) crush the tube (3) can be moved along the flow path axis of the tube (3) with the flow path closed.</p> |
