排灰设备的排灰才能应以能排出悉数收下的粉尘为准，粉尘量等于进口含尘浓度乘以处理风量。
Ash discharge equipment should be able to discharge the dust to accept all of the above, the amount of dust is equal to the concentration of imported dust by processing air.
含火山灰层沉积的植硅体分析为了解植被对从空中下降的火山灰的反应提供新的信息。
New information on the response of vegetation to air-fall volcanic ash is provided by analysis of phytoliths from sediments containing major tephra beds.
锅炉飞灰中含碳量高不但导致了锅炉燃烧效率的降低，也限制了飞灰的再利用。
High carbon content in fly ash not only results in the low combustion efficiency, but also limits its utilization as construction materials.
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