求翻译：煤粉细度：设计煤种煤粉细度按200目筛通过量为75%（R90=18.38 %在直吹式制粉系统中，磨煤机磨制的煤粉全部直接送入炉膛内燃烧。运行中，制粉量在任何时刻均等于锅炉的燃煤消耗量。也就是说，制粉量是随锅炉负荷的需要而加工磨制的。因此，直吹式制粉系统的特点就是磨煤机的制粉量始终等于锅炉的燃煤消耗量。是什么意思？

FINENESS: design coal pulverized coal fineness of 200 mesh sieve to 75% (r90 = 18.38% Pulverizing system, coal mill grinding of coal are all directly into the furnace combustion running, milling capacity at any given time is equal to the boiler coal consumption, ie, milling the amount of ground with

Coal powder fine degrees: The design of coal dust and broken down by 200 degrees through a sieve to 75 per cent (90 = 18.38 % R in direct blow-flour mill in the system, the coal is ground coal dust in all combustion furnace feed directly. In operation, the amount of toner system equal to any time of

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Coal powder fineness: design of coal fineness of coal powder 200 mesh pass 75% (R90=18.38% in the direct blowing pulverizing system, all direct mill grinding of coal powder into the combustion in the furnace. Run, flour milling at any time is equal to the consumption of coal-fired boilers. In other

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