Giant ground screw.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...w_fullsize.jpg
Apparently some sort of screw-in support system, whose ease of installation is here demonstrated by a barefoot woman in a red cocktail dress. 5:29 video:
Previously:
Giant Archimedes screw for sewage treatment - photo
Magnetic screwdriver - video
1871 automatic screw-making machine - video and photo
Correct way to drive a screw - GIF
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