<p>조립부품준비(밀링가공) - [인천소방고] 육면체가공1<br></p><p><br></p><p><a href="https://www.youtube.com/watch?v=oWry-z9rooA" target="_blank">https://www.youtube.com/watch?v=oWry-z9rooA</a><br></p>