Euler rotation? Cardan rotation?

[Hen-yu Lien]

Hi everyone! I am a doctoral student. Our lab got this software claimed
that it can process 3-D angular kinematic by Cardan rotation and Euler
rotation.I am quite confused by those terms. Are such terms well
defined? Do they only stand for different angular orientation or
different segment modeling? We ask the company the same question but the
company cannot give us a clear answer. Can someone help?
Thank you for your attention and time.

Hen-Yu