two-part cracking

The latest progresses of residuum catalytic cracking reaction technology were introduced, such as millisecond catalytic cracking process, the technology of catalytic cracking with down flow reactor, two staged riser catalytic cracking process and the family technology of producing lower carbon olefin by residuum catalytic cracking.

介绍了渣油催化裂化工艺技术的最新进展，如毫秒催化裂化工艺、下行床反应器催化裂化技术、两段提升管催化裂化技术以及以多产烯烃为目的的催化裂化家族技术等。

In the period of two years when Bohai Changqing floating production oil-storage unit is in operation, it is discovered that cracking has appeared on the welding between water-injection module column and main deck, and the slope support of boiler process module column has losed its stability.

渤海长青号浮式生产储油装置在投入运行两年多的时间内，发现注水模块立柱与主甲板焊接处开裂以及锅炉工艺模块立柱斜撑失稳。

It wasn't: for many, there is still little to match the joy of cracking the spine of a good book and settling down for an hour or two of reading.

但这并没有发生：打开一本好书噼啪地敲书脊、并且专心致志的花一两个小时来看书，这种乐趣是电脑无法相提并论。

Reducing olefin content process with catalytic agent RFG, GOR and MGD, and two stage riser catalytic cracking new technology.

降低烯烃含量的催化剂RFG、GOR系列及MGD工艺和两段提升催化裂化新技术；

Hydrongen induced cracking ( HIC ) and stress corinsion are two main modes of tubular goods failure.

氢致裂纹和滞后断裂是石油管材的主要失效形式之一.