A physical object that consists of two discs with equal thickness and outer diameter connected with a flat bar. One of the discs has a hole, while the other disc is without hole.
A physical object that consists of two discs with equal thickness and outer diameter connected with a flat bar. One of the discs has a hole, while the other disc is without hole.
A physical object that consists of two discs with equal thickness and outer diameter connected with a flat bar. One of the discs has a hole, while the other disc is without hole.