Using a strap adjuster to slide along two parallel resistive tracks, making contact between them and varying the amount of resistance between their ends.
Flickr set >> https://www.flickr.com/photos/plusea/albums/72157685063387786
Using a strap adjuster to slide along two parallel resistive tracks, making contact between them and varying the amount of resistance between their ends.
Flickr set >> https://www.flickr.com/photos/plusea/albums/72157685063387786
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