| 摘要 |
A sign frame includes a panel with a first side extension and a second side extension. The first side extension defines an opening for receiving ballast. The first side extension also defines a hollow chamber for storing the ballast. The panel also includes an upper crossbar that extends between distal ends of the first and the second side extensions, and a lower crossbar that extends between proximal ends of the first and the second side extensions. The first and the second side extensions, upper cross bar, and lower crossbar define a front surface and rear surface. The front surface is configured to receive signage.
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