| 摘要 |
A canopy structure having a canopy supported by a plurality of elongated support columns, each support column having a longitudinal cavity and an opening at a first end thereof to provide access to the longitudinal cavity. A container to receive a ballast material is positioned within the longitudinal cavity of each of the support columns to provide adjustable counterbalancing of the canopy structure. Each support column may be encased or covered by a sheath or other outer layer of material.
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