The smoke of steel ball bearing pressure such as depth limit ring precision sure.
钢球的烟如深度有轴承压限位环精度确定。
The mining depth of this deposit is great and its underground pressure activities are Strong.
矿床开采深度较大，地压活动更为强烈；
The mining depth of this deposit is great and its underground pressure activities are Strong.
矿床开采深度较大，地压活动更为强烈；
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