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| 崩落角; 裂缝角在充分或接近充分采动条件下，移动盆地主断面上，地表最大的裂缝和采空区边界点连线与水平线在煤壁一侧的夹角 | |||
| English thesaurus | |||
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| angle of draw; caving angle | |||
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