| CPC A47B 96/1466 (2013.01) [F16B 47/00 (2013.01)] | 33 Claims |

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1. A multi-purpose rack crossbar, comprising: a rack crossbar body, and a first mounting component connected to the rack crossbar body; the rack crossbar body is provided with a first mounting groove and at least one second mounting groove, the first mounting groove is connected to a first end of the first mounting component, and a runner assembly is provided at a second end of the first mounting component; wherein the second mounting groove comprises: a second opening portion and a second receiver which is connected to and wider than the second opening portion; wherein the second receiver comprises: a first rectangular portion connected to the second opening portion; wherein the runner assembly comprises: a universal structure consisting of a spherical structure and a third mounting groove fitted to the spherical structure.
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