This is determined by the characters of metal production procedure as well as selective mining method itself.
这种情况是由于金属生产和选别式地下开采的特点而引起的。
The basic principle, major controlled process condition, mining process and its characteristics of selective leaching are analyzed. It is a clean mining process of high efficiency.
本文分析了选择性溶浸法开采钾盐矿的基本原理、主要控制的工艺条件、开采工艺流程及其特点，它是一种清洁、高效的开采工艺。
Association rule mining is an important sub-branch of data mining. It has been used widely in selective marketing, telecom business, bank management and so on.
关联规则挖掘是数据挖掘的一个重要分支，并被广泛应用于市场营销、电信、银行等应用领域。
Association rule mining is an important sub-branch of data mining. It has been used widely in selective marketing, telecom business, bank management and so on.
关联规则挖掘是数据挖掘的一个重要分支，并被广泛应用于市场营销、电信、银行等应用领域。
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