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자유 단면 굴삭기
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자유 단면 굴삭기

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Also known as boom-type roadheader, road header machine, road header, header machine

thumb|250px|A typical roadheader A roadheader, also called a boom-type roadheader, road header machine, road header or just header machine, is a piece of excavating equipment consisting of a boom-mounted cutting head, a loading device usually involving a conveyor, and a crawler travelling track to move the entire machine forward into the rock face.

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Roadheaders
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