This paper expounds the adaptibility of coarse sand filter with simultaneous air and water backwash to tertiary filtration plant.
阐述了粗石英砂气水同时冲洗滤池，在污水深度处理中的适用性。
2
Lummus technology of tertiary refrigeration has been applied successfully to the expansion of ethylene plant in Qilu as its first commercial application.
中国石化齐鲁股份有限公司烯烃厂乙烯装置二期扩建首次将三元制冷技术应用于工业生产，并取得成功。
3
Plant area was distributed over Quaternary system alluvium and deposit of oxbow lake facies, base rock is Tertiary red rock.