I'm printing this now. I just wanted to comment with an English translation of the description (translated by computer):
> Spring-like suspension test at angles of 75 degrees, 80 degrees, and 85 degrees.
> Spring diameter: 20mm, wire diameter: 6mm, thickness: 2mm.
> Due to the spiral suspension, it is quite difficult to print.
> It is recommended to use 100% infill for printing.