英语语法分析

The process of adding hydrogen gas in fuel gas of ethylidene chloride pyrolyzer and its effects were introduced.

介绍了在二氯乙烷裂解炉燃料气中添加氢气的工艺过程和效果。

The developments of manufacturing technology and research on ethylidene norbornene abroad were reviewed with 71 references.

介绍了国外亚乙基降冰片烯的生产技术和科研工作的进展情况。