Then, this chapter analyses economic theoretical foundations in the existence of the financial conglomerates: large-scale production, range economy, coordination effect and risk dispersion.
接着本章分析了金融集团存在的经济理论基础：规模经济、范围经济、协同效应和分散风险四个方面。
The results show that the blast hole diameter has little effect of the vibration level in production blasting, and the other factors should be considered in large scale delay blast design.
结果表明，除炮孔孔径在实际生产爆破中对振动影响不明显外，其它因素在大区微差爆破的设计中都值得注意。
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