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

热解产品（气、液、固）可作为很有价业燃料或原料。

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

研了乙烯裂解服材料内部组织损伤程度与焊接性关系。