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单词
shortwall
释义
shortwall
shortwall
[
′shȯrt‚wȯl
]
(mining engineering)
A method of mining in which comparatively small areas are worked separately.
A length of coal face between about 5 and 30 yards (4.6 and 27 meters), generally employed in pillar methods of working.
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更新时间:2025/3/14 22:36:07