Pyrolysis products from a FB pyrolyzer can be utilized as high quality fuel or chemical feedstocks.

热（气、液、固）可作为很有价值的工业燃料或原料。

The relation of internal microstructure damage degree of furnace tube in a ethylene pyrolyzer with weldability was studied.

研了乙烯裂炉服役炉管材料内部的组织损伤焊接性的关系。