| 摘要 |
An adjustable bushing according to one embodiment includes a first part having a threaded section that extends outwardly from a base section such that an upper surface of the base section defines a ledge that surrounds the threaded section. The adjustable bushing also includes a second part having a threaded opening that is open along a bottom surface of the second part. The threaded opening has threads that are complementary to threads of the threaded section of the first part to permit the first and second parts to be securely coupled to one another and permit a height of the bushing to be adjusted between a fully retracted position where a height of the bushing is at a minimum and a fully extended position where the height of the bushing is at a maximum. |
