The major volcanic reservoirs are mainly in the effusive facies, and the best reservoir belts are in the gascavity belts on top and at base of the effusive facies.
火山岩储层主要发育在溢流相，尤其是溢流相顶底部的气孔带是最为有利的储集相带。
2
The induced electromagnetic field possesses the action of electromagnetic purification, and effectively removes formation of impurity grain, segregation, negative segregation and gascavity.
感生磁场具有电磁净化的作用，可以有效地消除杂质颗粒以及偏析、负偏析和气孔形成的机率。
3
According to the gascavity in concrete construction, it analyzes the cause of it from materials and process, and corresponding measures are putted forward to relief gascavity in concrete surface.