| 摘要 |
An elongated base component has primary and secondary ends with a first length and upper and lower and lateral side surfaces. A first cross piece with a second length is operatively located at the primary end of the base component and has an upper end extending upwardly and a lower end extending downwardly. A second cross piece having a third length is coupled to the base component and spaced from the secondary end has an upper end extending upwardly and a lower end extending downwardly. An intermediate means is coupled to the base component intermediate the first and second cross pieces.
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