| 摘要 |
A tone arm comprising a lever with a pickup cartridge on its end and a tracking-force setup assembly, a movable base connected to the lever, and a fixed base, the two bases facing each other. Installed between said bases are a vertical pivot attached to one of the bases and cooperating with a spherical thrust bearing in the other base, and a ball making contact with one of the bases and cooperating with a guiding element in the other base. The guiding element may represent an arched slot, two equidistant arched lugs or a spherical hole.
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