| 摘要 |
A bracket assembly including a first bracket assembly that includes an annular portion and a pair of opposing flange members extending outwardly from the annular portion so as to define an open center between the pair of opposing flange members, and a second bracket assembly that includes a back plate and two opposing sidewall members extending outwardly from the back plate. The second bracket assembly is received in the open center defined by the first bracket assembly, wherein the first bracket assembly includes an extended back portion that projects axially beyond the top edge of the back plate.
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