| 摘要 |
<p>The present invention relates to a gear and a gear set. More specifically, the present invention relates to a gear and a gear set having the same, wherein the gear includes: first and second coaxial outer ring parts having a predetermined diameter and a gear part on the outer side; and an inner ring part placed between the first and second outer ring parts to separate the first and second outer ring parts from each other and configured to be coaxial with the first and second outer ring parts. The inner ring part has a diameter smaller than the first and second outer ring parts.</p> |
