| 摘要 |
Safety selection pin for weight stack selection system wherein the mid portion of the selection pin is machined down in diameter, forming a shoulder on the edge of the cut out portion. The length of the cut is slightly longer than the diameter of the central stem, or longer than the engaging portion of a link-connector in a "stemless" system, preventing the selection pin from being pulled out during the loaded state of a weight stack exercise machine, thus helping to avoid accidental injuries to users and nearby people.
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