The development trend of scraper conveyor used at working face of underground coal mine overseas is to have greater driving power.
国外用于采煤工作面的刮板输送机的发展趋势是加大驱动功率。
Participants showed significantly more clinical signs of facial aging on one side of their face due to driving or working close to windows over many years.
研究者试验发现，长期靠近车窗或者窗边的半边脸会衰老的很严重。
Participants showed significantly more clinical signs of facial aging on one side of their face due to driving or working close to windows over many years.
研究者试验发现，长期靠近车窗或者窗边的半边脸会衰老的很严重。
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