为了不使镍环起槽，外沟直径比内沟大，这在结构上解决了镍环起槽问题。
In order not to make nickel ring up tank, outside groove diameter ratio inside groove is big, this on the structure solved the nickel ring grooving problem.
介绍了在VB6.0环境下开发的垃圾场运输车辆自动化管理系统，及此系统在牡丹江市郭家沟垃圾处理场的应用效果。
Waste vehicles automatic management system developed by using VB6.0 and its application effect in Guojiagou landfill site of Mudanjiang city were introduced.
细沟侵蚀过程中水流跌坑的出现是极其重要的一环。
It is a very important point of the appearance of flow drop pit during the process of rill erosion.
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