The results showed that the molten steel enters into the mould assembly in three flows of which the two move upward peripherally at the same time to form symmetrically two eddies at the upper part of the mould,while the other one moves downward peripherally and,eventually,g.

In accordance with the characteristics of fractured- vuggy carbonate reservoir,based on the analysis of reser- voir features and the fracture-cave combination pattern, the flow mechanism and connectivity among reservoir space has been first discussed in this paper.

The paper introduced the biological characteristics of several main pot cultured tangerines and the combination pattern of polychrome potted tangerine briefly,and the culture techniques of each combination such as grafting,fertilizer and water management,pruning,flower promotion and retention, fruit retention,pets and diseases controlling,pattern,maintenance in ornamental period were elaborated.