以掘进工作面为例，进行矿井透水事故危险性评价。
Carry on dangerous appraisal of mine water leakage accident while regarding tunneling face as an example.
以旋转抛物面为例对空间曲面的五轴加工进行分析和数学推导，并对其进行误差分析和数据处理。
The paraboloid of revolution is taken as an example to progress the study, derivation, error analysis and data processing of the five axes machining for space curved surface.
并以大柳塔矿1203和20601两个工作面为例，论述了该方法的可行性及不同防治方案的比较。
It also took Da Liuta mine 1203 and 20601 two face for examples, discussed feasibility of the method and contrast of different controlling schemes.
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