据此研究了小区域范围内土壤水分和溶质的运移特征，讨论了土壤水分和盐分分布的空间变异性和统计特征。
Soil water movement and solute transport in the local scale were studied and the spacial variability of soil water content and concentration were discussed.
出口和现场应用表明，该型钻机不仅具有结构简单、安全可靠和设计紧凑等优点，而且具有移运方便和使用范围广等不可比拟的优势。
Application shows that the new rig is characterized by simple and compact structure, safe and reliable operation, convenient transportation and wide use.
而当扩径段长度大于一定范围时，岩屑在此段的静态运移规律和动态运移规律差别不大。
However, when the length of hole enlargement is larger than certain range, the cuttings static migration law and dynamic migration law is not so much different in hole enlargement section.
而当扩径段长度大于一定范围时，岩屑在此段的静态运移规律和动态运移规律差别不大。
However, when the length of hole enlargement is larger than certain range, the cuttings static migration law and dynamic migration law is not so much different in hole enlargement section.
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