卧式加工中心在早期故障期时，故障率曲线为递减型，间隔时间服从威布尔分布。

The failure curve of the horizontal machine center during the forepart fault is degressive, the internal time is Weibull distribution.

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坡面各部位相对侵蚀量随时间的变化可能存在三种模式，增长递减型、递增型和波动型。

It was concluded that the distribution pattern of erosion with the rainfall time expressed three types, they were increase-decreasing type, increasing type and wave type.

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