| 摘要 |
In an air exhaust valve, a valve seat member has an annular valve seat portion at a valve seat portion wall thereof. A plate-shaped valve element is disposed on the rear side of the valve seat member so as to open and close the annular valve seat portion. A cover member is made of a sound absorption material, and bulges from the valve seat member to the front side at a sound absorption cover. An opening portion is formed in a lower wall of the sound absorption cover. |
