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。
2
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。
3
After operation of ethylene cracking furnace for many years, the furnace lining was effloresced seriously. The radiating heat loss of furnace wall was larger.