The structural member having first and second sidewalls (62 and 68), each having an upper end and a lower end.

该构件包括第一和第二侧壁(62和68)，每一个侧壁具有一个上端和一个下端。

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The structural member having first and second sidewalls (62 and 68), each having an upper end and a lower end.

该构件包括第一和第二侧壁(62和68)，每一个侧壁具有一个上端和一个下端。

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