Therefore, the research on the optimization of bidirectional marshalling yard stage plan has important theoretical and practical significance.
因此，对双向编组站阶段计划优化编制问题的研究，具有重要的理论和实际意义。
2
Objective: Research the bidirectional compound fermentation of 14 Ganoderma strains and glycyrrhiza waste residue, and study the polysaccharose content of the fermentation product.