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

热产品（气、液、固）可作为很有价值的工业或原。

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

研了乙烯裂役管材内部的组织损伤程度与焊接性的关系。