전문 번역가, 번역 회사, 웹 페이지 및 자유롭게 사용할 수 있는 번역 저장소 등을 활용합니다.
mit aufkommender mechanisierung, insbesondere beim abtransport der kohle, konnten die streblängen wesentlich vergrößert werden.
miners would undercut the coal along the width of the coal face, removing coal as it fell, and using wooden props to control the fall of the roof behind the face.