function ruler —
Founded function ruler models & stl files for printing
CR3D
David Payne
mscalora
MacaulayHonorsCollege
The Egg Master
Functionalize
Borgey
GeorgeZSL
Intentional3D
Creator2750
legithings
HawkWorley
mathp8
PRTMe3D
mkoistinen
Souzoumaker
Prusa Research
vvision
BertUK
The3Designer