Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
외사이클로이드 곡선은 원의 외부에서 생성됩니다.oesaikeulloideu gakseun-eun won-ui oebuseo saengseongdoemnida.The epicycloid curve is generated from the outside of a circle.