막힌 구멍이란 무엇이며 완벽하게 가공하는 방법은 무엇입니까?
A blind hole is a hole drilled, milled, or bored into a material that doesn’t penetrate through to the other side. Unlike through holes, blind holes have a defined depth and a bottom surface. They are commonly used in applications where a fastener or component needs to sit flush or be hidden within the material.