The study of the protosepta number, the yielding position and fashion, the arranging system of Heterocorall septa is basic premise in discussing the origin, evolution and classification of Heterocorall.

Chinese scientists have gotten outstanding achievement in the classification, microstructure and septal evolution of the heterocoral.

Since the discoverv of new heterocoral with 3 septa,the septal variety ofthe different genera of heterocorals has been clearly revealed.

In this paper, the general features, technical development, equipment matching and coal mining technology of short wall shearers both at home and abroad are discussed, which supplies reference to the units doing research, manufacturing, type selecting and applying of shearers.

A laboratory scale dividing wall column(DWC) was built for separating a mixture consisting of ethanol/n-butanol/hexanol in order to study the characteristics of the DWC.