对目前国内外管杆偏磨腐蚀理论研究进展和应用研究防治现状做了概括述评，指出了存在的问题，并提出了下一步研究的方向。
The advances in theoretical research and application status of abrasion were reviewed, some problems were found and the next priority research area were listed in the paper.
本部分意在概括目前土地存在的现状和问题，在对现状、问题深入分析的基础上提出对策建议。
This section is meant to cover the current status and problems of land there, in the present situation, the problem in-depth analysis to propose a solution based on the recommendations.
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