单词：pillar support
pillar support的用法和样例：
例句
- In open stopes the ground above the stope will support its own weight.So the stope is shaped like a series of rooms divided by walls or supported by pillars of ore.空场回采工作面利用采场上方的岩层支撑自身的重量，所以采场被切割成一系列的由矿壁分隔或用矿柱支撑的峒室。
单词：pillar support 相关文章
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创世记
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英语新闻
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趣味英语
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趣味英语