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롤러 원뿔체 드릴 비트

다른 동영상
December 09, 2024
잡담
롤러 코너 비트 또한 3 롤러 코너, 베어링, lurbication 시스템으로 구성된 트라이콘 비트라고합니다
3구륜비트 롤러 원추형 비트 조금 주조형비트
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