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单词
radial percussive coal cutter
释义
radial percussive coal cutter
radial percussive coal cutter
[
′rād·ē·əl pər′kəs·iv ′kōl ‚kəd·ər
]
(mining engineering)
A heavy coal cutter having a percussive drill, with extension rods; used in headings and rooms in pillar methods of working and for drilling shot-firing holes.
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更新时间:2024/9/24 23:25:15