| 摘要 |
Disclosed is a tool comprising a cam track and cam follower means, wherein the cam track comprises a first cam track wall means and the cam follower comprises a first cam follower wall means, and the first cam track wall means and first cam follower wall means face one another. The cam track further comprises a second cam track wall means and the cam follower comprise a second cam follower wall means, and the second cam track wall means and second cam follower wall means face one another. The first and second cam track wall means are disposed so as to face one another. The first and second cam follower wall means are disposed so as to oppose one another, e.g. back to back. The first/second cam track wall means comprise a first/second cam track wave . The second cam follower wall means comprise a first/second cam follower wave.
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