查询词典 soil survey

This text passes correctly elm two of Daqing oil field is united --One Song unite person who bury oil pipeline scene to live in environment survey and study, is it take a sample test , environmental corrosivity survey , corrosivity measuring of pipeline and assess of soil to excavate, is it cause person who bury pipeline antiseptic layers of invalid main factor to find out , confirm the environmental grade of corrosion of soil according to environmental comprehensive physics and chemistry index of soil, grasp pipeline antiseptic invalid law of layer , study antiseptic layers of resistivity decay law and to influence that negative pole protect, is it suitable for person who bury antiseptic layer of life-span of the pipeline calculate formulae and actual effect criterion model to propose on the basis of this text, illustrate and simply analyse oil field long to fail person who bury antiseptic layer of surplus ability to work of the pipeline, unite for elm two --One Song unite pipeline antiseptic maintenance of layer , is it put forward science rational suggestion to change.

本文通过对大庆油田榆二联——宋一联埋地输油管道所处环境的现场调研、开挖取样化验、环境土壤的腐蚀性勘测、管线的腐蚀性检测和评估，找出引起埋地管道防腐层失效的主要因素，并根据环境土壤的综合理化指标确定该段环境土壤的腐蚀等级，掌握管道防腐层的失效规律，研究防腐层电阻率衰减规律及其对阴极保护的影响，在本文的基础上提出适用于埋地管道防腐层寿命计算公式和失效判据模型，例证和浅析油田长输埋地管道防腐层剩余工作能力，为榆二联——宋一联管道防腐层的维修、更换提出科学合理的建议。

Hence, it is a feasible new method worth extrapolating in soil survey and mapping.

应用该方法制作大比例尺土壤详图不失为土壤调查与制图领域一种可行的新方法。

Database was selected from the database of Second General Soil Survey Database of Guangdong Province.

并利用所提出的方法对广东省的土地进行了评价。

In the second chapter, soil survey results of the National Experimental Station for Precision Agriculture were provided.

论文的第二章主要基于精准农业中变量技术的要求，对作物生长的环境实现变量管理，对小汤山国家精准农业示范区内的土壤类型和理化性状进行了调查和分类。

They compared the results of a national soil survey taken in the 1980s with surveys conducted over the past decade.

他们将20世纪80年代进行的全国土壤勘测结果跟过去十年中的勘测资料做了对比。

Throughout this period in the UK Australia and Wageningen Peter was engaged in the development and implementation of advanced computer and statistical methods for practical soil survey.

在整个英国，澳大利亚时期，荷兰瓦赫宁根，彼得从事开发和先进的计算机和实际土壤调查统计方法的实现。

Having analysed the data of soil survey, the soil types have close relation to natural conditions and change with the external conditions.

本文对桃山林区土壤普查进行分析，土壤类型与自然条件密切相关，而且随着外界条件变化而逐渐变化。

This paper mainly makes use of basic information of the second national soil survey, studies organic carbon density and pool of different soil types in Anhui Province, and also analyses natural and artificial factors which influence the distribution of SOC.

本文采用第二次土壤普查资料，研究了安徽省不同类型土壤的有机碳密度和碳库，分析了影响土壤有机碳分布的自然和人为因素。

Furthermore, method was adaptive to point, line-transect and plot surveys, thus it could be applied well to other kinds of soil survey activities.

该方法对土壤调查以及其他野外工作具有较高的应用价值。

This paper analyzes the influence of frozen soil,foundation freezing and thawing on pipeline,describes the importance of pipeline survey in frozen soil district and introduces the steps and methods of pipeline survey in frozen soil district.

分析了冻土及地基土冻胀和融沉对管道的影响，阐述了在冻土地区管道勘察的重要性，介绍了冻土地区管道勘察的步骤和方法。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐