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煤层及其顶底板中滑动现象极为普遍。
The sliding phenomenon between coal seam and its roof or floor is very common.
youdao
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从底板变速器-传动轴盖板中拆去底板支柱。
Remove the floor console from the floor pan transmission tunnel.
youdao
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从底板变速器-传动轴盖板中拆去底板支柱。
Remove the floor console from the floor pan transmission tunnel.
youdao