| 摘要 |
A hoist apparatus for positioning and supporting a load includes an elongated hollow tubular post extruded of aluminum and formed with a plurality of substantially circular holes formed in certain of the walls adjacent a hollow interior of the post. The holes extend throughout the length of the post and have only a short end section thereof adjacent the end edges of the post tapped to provide internal threads for receiving threaded fasteners for mounting the post on a support base and for securing a drive screw end cap plate on the top of the post.
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