Introduction : yh series of artesian well has a good lubricity , floatability and rheopery . it plays an important role in protecting the wall of the well , and it also can be used in the aspects of oil field artesian well and oil base unfreezing slurry 介绍： yh系列钻井用膨润土具有良好的润滑性，悬浮性和触变性，能有效地起到保护井壁的作用，可用于油田钻井，油基解卡泥浆等方面
The changing procedure of soil water infiltration capacities is in keeping with second - degree polynomial change functions in cornfield , sesame field and fallow field and with quartic - degree polynomial change functions in wheat field in unfrozen phase , the changing process of soil water infiltration capacities suit second - degree polynomial change functions in various husbandry condition in frozen phase 在非冻结期，玉米地、芝麻地和休闲地的土壤水分入渗能力的变化过程符合二次多项式变化规律，小麦地的土壤水分入渗能力符合四次多项式变化规律；在冻结期，无论是哪种耕作条件土壤水分入渗能力符合二次多项式变化规律。
Haixi bay is a wind protected unfrozen deep harbor with good geological structure at north latitude 35 - 36 , neighbouring to qingdao port which is one of the largest sea ports along the west coast of pacific ocean , while the ship - building and repair base in haixi bay is an important part of china state long - term ship industry development planning 青岛海西湾造修船基地是国家中长期发展规划环渤海湾造船基地建设的一个重要组成部分，位于胶洲湾东南端，北纬36度，是常年不冻不淤的深水良港，与海运重要港口青岛前湾港相邻，地理位置优越，交通便利，气候适宜。
In this paper , based on the tracing field infiltration tests into frozen and unfrozen soils with three species of soil texture and eight species of soil structure in seasonal frozen soil regions during three overwinters , the basic infiltration characteristics , reduction infiltration mechanism and major factors influencing soil infiltration characteristics are studied all - sidedly and systematically . to master frozen soil infiltration characteristics and supply scientific directions for winter irrigation 本文基于季节性冻土区田间三种质地、八种结构历时三个越冬期的冻土、非冻土入渗跟踪试验，全面、系统地研究了冻融土壤的入渗特性、阻渗机理和影响冻融土壤入渗特性的主要因素，掌握冻融条件下土壤水分入渗特性，为冬灌及农业节水灌溉提供科学依据。
