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[left] Commercially available extendable poles. (Slipstream/ DEHCR) [middle] Homemade extendable PVC framework. (Slipstream/ DEHCR) [right] A 1¼-inch PVC pipe with a 1-inch PVC pipe inside it allows poles to move up and down and clamp in place. (Bob Pfeiffer, Slipstream/DEHCR)

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Uploaded on December 9, 2019