| 摘要 |
<p>An insert (100) having a first insert portion (102) a second insert portion (104) and a third insert portion (106) for installation into a first bore portion (136), a second bore portion (138) and a third bore portion (140) respectively in which the first bore portion (136) is larger than the second and third insert portions (104, 106) and the second bore portion (138) is larger than the third insert portion (106).</p> |
