dust accumulation造句

• Where , following an abnormal condition , the removal of dust accumulations or layers cannot be assured , then the area is to be classified zone 21
  如果不能保证排除可燃性粉尘堆积或粉尘层时，则应划分为21区。
• At same time , adopt smoke air on horizontal brush heat scatter and pressure load smoke exhaust ways , the heat exchange part no dust accumulation , no need to clean , stable on heat performance
  C .同时采用了烟气纵向冲刷散热片和负压吸式排烟方式，换热部位不积灰尘，无须清理，热性能稳定。
• The holocene loess - soil sequence in the loess plateau constitutes an excellent record of evolution of soil formation , monsoonal climate , aeolian dust accumulation and influences of arable farming of over 8000 years
  长期农牧业的发展，使得天然植被在大多数地方已荡然无存，大片的林地被开垦为农田或被开辟为城市用地。