Floor slip resistance testers. Both testers have rubber pads that are either dragged (bottom machine) or swung (top tester) to measure floor slip.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
Previously:
Slippery fire station floor - GIF
Cordless floor drying cone - photo
Wood floor water extractor - GIF
Vinyl flooring heat welder - GIF
Caulking floorboards - GIF
Building model with pivoting floor section - GIF
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