| 摘要 |
A device for supporting an article 27 such as a lapping tool for polishing lenses is designed to allow limited motion of the article about a central point. The device comprises a base 1, a mount 2 and a bearing between the base and the mount allowing the said motion of the article when in place on the mount; while previously the joint has been a complicated gimbal arrangement, which is difficult to maintain, in the invention the bearing comprises a ball-and-socket-type joint 9,14. <IMAGE>
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