Quiz #41

Our last quiz, #40 was featuring A-traction. The correct answer wasfirst submitted by Dr. Sanghyun from Kyungpook National University. Congrats! His prize is a finest bottle of Hungarian wine - to be delivered at an upcoming conference (should we be able to have those again...)

Here is our next one for you! What system is on the picture above? You can submit your answers to surgrob.blog at gmail.com until October 31.