The results of joint action experiments showed that, except of the binary mixture of tetracycline and 7-aca had antagonistic effect, the other binary mixtures showed simple additive effect.
Reason of invalidation failure was analyzed on expansion joint of second stage exchanger of mixture hydrogen in semi-regenerative reformer.
分析了半再生重整装置二段混氢换热器膨胀节失效破裂的原因。
3
The appearence characteristics of the heterogenous mixture zone near the bottom of weld metal in the fusion welded joint are studied through metallographic observations of many fusion welded joints.