The business concentrative degree is an important index which reflects different management modes and size extension ways of firms, such as the specialization, diversification and so on.
业务集中度是反映企业专注于专业化、多元化等不同经营模式和不同规模扩张方式的一项重要指标。
The property, significance, economic and technic index, specialization of afforestation in metallurgical industries and mines are discussed.
主要对冶金工矿企业绿化的性质与地位，经济技术指标，专业绿化等问题进行了探讨。
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