初级和次级破碎和配套的干筛系统的设计和规模确定，是依据每年运行6000小时或总时间的68.5%。

The primary and secondary dry crushing and associated dry screening systems are designed and sized to operate 6000 hours per year or 68.5 percent of total time.

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我想设定一个阈值的几个小时，我将减去总的运行。

I want to set a threshold number of hours which I will subtract a running total from.

youdao

我想设定一个阈值的几个小时，我将减去总的运行。

I want to set a threshold number of hours which I will subtract a running total from.

youdao