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| 台阶坡面角台阶坡面与水平面的夹角称为台阶坡面角。台阶坡面角又分工作台阶坡面角和最终台阶坡面角。后者小于前者。台阶坡面角对工作帮坡角和最终边坡角有一定影响。中国金属矿山的台阶坡面角一般为65。 belt 70° | |||
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