| 摘要 |
A check valve for medical infusion lines and the like, including a diaphragm made of elastically deformable material inserted between an upstream passageway and a downstream passageway and cooperating with an annular valve seat to keep the check valve normally closed. The annular valve seat is formed by a front surface of the first tubular element, and the diaphragm consists of the bottom wall of a cup-shaped element arranged coaxially with the upstream and downstream passageways.
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