| 摘要 |
<p>MULTIPLE SEAL RINGA multiple seal ring includes a main ring body (4) and an auxiliary ring body (51) that has a maximum thickness more than or equal to that of the main ring body. When the main ring body (4) no longer has the sealing function due to degradation or corrosion, the auxiliary ring body (51) can maintain the sealing function of the multiple seal ring. (Figure 2 is suggested for publication)</p> |
