The modeling of THR resonator (2019) ⓒGRAYCODE, jiiiiin
3d modeling of THR Resonator :  Yoo Sang Wook
Inspiration for THR resonator ⓒGRAYCODE, jiiiiin @zkm 
The notation of e^ix, it's necessary (2019) ⓒGRAYCODE, jiiiiin