Therefore it can totally replace the imported material for lining the catalytic cracking reactor and regenerator.
用于催化裂化反应器衬里，可完全取代进口材料。
The mechanism of cracking tunnel lining without any major progress in long time, cracking reasons were also unclear.
长期以来隧道衬砌开裂的力学机理研究没有大的进步，开裂原因亦不甚清楚。
After operation of ethylene cracking furnace for many years, the furnace lining was effloresced seriously. The radiating heat loss of furnace wall was larger.
乙烯裂解炉经多年运行，炉衬粉化严重，炉壁散热损失较大，热效率下降。
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