查询词典 water-tight

The phytoplankton community was mainly composed of Cyanophyceae, Euglenophyceae, Bacillariophyceae, and Chlorophyceae, and the dominant species were Oscillatoria subtillissima, Dactylococcopsis irregularis, Euglena caudata, Melosira granulata, Cyclotella meneghiniana, Chlorella vulgaris, and Scenedesmus quadricauda. The main environmental factors affecting the distribution of phytoplankton species in July were ammonium-nitrogen, dissolved oxygen, water temperature, and total phosphorus, while those in September were pH, water temperature, dissolved oxygen, transparency, and total nitrogen. Water transparency and zooplankton were the main factors affecting the biomass of Cryptophyceae, Pyrrophyceae, and Bacillariophyceae; while nitrogen, phosphorous, and dissolved oxygen were the main factors affecting the biomass of Cyanophyceae, Euglenophyceae, and Chlorophyceae.

结果表明：调查期间共鉴定出浮游植物384种，隶属于8门，浮游植物密度范围为2.01×105～57.60×105 cells·L-1；群落组成以蓝藻、裸藻、硅藻和绿藻为主，主要优势种有细微颤藻、无常蓝纤维藻、尾裸藻、颗粒直链藻、梅尼小环藻、普通小球藻、四尾栅藻等；7月影响浮游植物分布的主要环境因子依次为铵态氮、溶解氧、水温和总磷，而9月的pH值、水温、溶解氧、透明度和总氮含量对浮游植物的分布产生影响较大；其中，透明度和浮游动物量是影响隐藻、甲藻和硅藻藻类生物量的主要环境因子，而蓝藻、裸藻、绿藻主要受水体氮磷营养盐浓度和溶解氧的影响。

How to do this is: the series-water roll clamping in grinder, head of the bed with a fixed Center, bed end, respectively, with huoluo thimble, despite a string of water both ends of the roll Center always ends up in l, with a dial check and correction of water roll radial runout of excircle and the tiaodong of error control in 0.02mm, to achieve accuracy requirements.

抽象操纵为：把串火辊夹持在磨床上，床头用变动顶针，床尾用方活顶针，分别顶住串火辊两头的边缘孑L，用百分表查抄和订正火辊外方的径向跳动度，并把跳动度的差错把持在0.02mm不以外，使其到达不粗度请求。

Keywords: Layering is poured water into, Breathe in water power force, the tube of pour water into, excluder, bottom hole regulator

井下工具部分详细介绍了注水管柱及其配套的工具。

Based on the water resources survey of Shanghai in 1999 and the 1:50 000 color infrared aerial photos obtained in early 2000, a case study of the upper Huangpu River was carried out. The exponential method, pair-sample t test, and remote sensing analysis are used to analyze water environmental characteristics and land use pattern in the river network plain. In order to explore response of water quality in the waterhead region to the changes in land use and its driving force, five land use patterns are selected and a new type of exponential is designed.

以黄浦江上游水源地为例，利用1999年上海水资源普查数据及2000年初成像的上海市1：50000彩红外航空像片，采用GIS空间分析技术、灰色关联分析技术，划分土地利用样带，设计水质改善指数，探讨平原河网地区水环境质量对土地利用结构的响应，以及水源水质对土地利用变化驱动力的响应。

This issue through the mortar bar test or production of the concrete channel to study the color, the color white concrete methods; the use of inorganic pigments and titanium dioxide composite technology, outstanding preparation in prison and a better color fair-faced concrete; by optimizing the aggregate gradation, the use of high-quality, stable mineral admixture to improve concrete performance, color, white water of the large concrete fluidization; PW 42.5 the use of white cement and a new type of polycarboxylic acid superplasticizer in concrete to ensure good performance at the same time, reducing the water consumption of concrete, the preparation of a white water high-strength concrete.

本课题通过砂浆棒试验或混凝土色板的制作，研究彩色、白色混凝土的配色方法；采用无机颜料与钛白粉复合技术，配制出色牢性较好的彩色清水混凝土；通过优化骨料级配、使用高品质、稳定的矿物掺合料，提高混凝土的工作性能，实现彩色、白色清水混凝土的大流态化；采用 P.W 42.5的白水泥与新型的聚羧酸减水剂，在保证混凝土良好工作性能的同时，降低混凝土的用水量，配制出高强白色清水混凝土。

The Necessity of water saving agriculture in the loess plateau of China is analysized,and main types of regulating soil water techniques are sumed up as follows:accumulating fertileness,crop rotation,intermittent fallowness of soil,drought resistant crop breeding, water saving ,run off agriculture and chemical methods.

分析黄土高原节水农业的必要性，总结出黄土高原农业调水技术主要有 7大类：培肥地力以肥调水，轮作倒茬调水，间隙休闲调水，抗旱育种调水，节水灌溉调水，径流农业调水，化学技术调水；指出在干旱、半干旱的黄土高原地区，利用农业调水技术是粮食增产增收的有效措施和必然趋

Through the analysis on geochemistry of palaeohydrology,we can know the origin of the oilfield water and then conclude the geofactor and the geochemical factor of the formation water.Through the study and the comeback of the palaeohydrodynamic field, we can judge the migration direction of the petroleum,the separate between gas and water,and the relation between the petroleum and the pool.

通过对油气成藏系统中古水文地球化学分析，可以了解油田水的起源，推断地层水化学成分形成的地质、地球化学作用；通过对古水动力场的恢复与研究，可以判识油气运移方向，气水分异状况，及其与油气藏形成的关系。

The deep bed filter is one of the basic units in water treatment engineering,it plays an important role in the produced water treatment of oil field and waste water treatment of refineries.

深层过滤是水处理工程中的基本单元方法，在油田注水处理、石化厂废水治理方面有很重要的地位。

As to the work about theory analysis, at first, the paper describes the atomizing and humidifying process of the centrifugal nozzle with firing pin type, high pressure and little aperture and liquid physical properties. Later, combining with the structure characters of this kind of nozzle, the paper studies on the theory of the atomizing and humidifying process by three phases, which is water film forming phase, water film falling into pieces phase, and heat and mass transfer between water and air phase in turn.

理论工作方面，首先描述了撞针型高压小孔径离心式喷嘴的雾化加湿过程和液体的物理性质，然后结合撞针型高压小孔径离心式喷嘴的结构特点，将其雾化加湿过程分三个阶段进行机理上的研究，这三个阶段依次为液膜形成、液膜初次破碎及二次雾化、水与空气的热湿交换。

Widely distributed in Central America of fresh water and salt waters, the United States for the main freshwater aquaculture species. 1999 U.S. freshwater aquaculture production accounted for about 81 percent of the large warm-water species of fish, fork spots to fish tail as the Ministry of Agriculture to promote the country's fresh water breeding improved varieties have a very obvious advantages: First of Table no scales no small thorn, processing convenience and the other is the quality and refine, nutrient-rich, easy to digest and absorb the third is of miscellaneous eating habits, fast-growing, high yield, strong adaptability and easy to keep the fourth character is tame, like cluster activities , High density of aquaculture, particularly the pond custody and cage culture Fifth Tansi, easy fishing, Youdiao suitable for the development of leisure industry.

广泛分布于美洲中部的淡水和咸水水域，为美国的主要淡水养殖的品种。1999年约占美国淡水养殖总产量的81%，该鱼种是大型温水性淡水鱼类，斑点叉尾回鱼作为农业部向全国推广的淡水养殖的优良品种具有很明显的优点：一是体表无鳞没有小刺，加工方便；二是内质细嫩，营养丰富，容易消化吸收；三是食性杂，生长快，产量高，适应性强，易于饲养；四是性格温顺，喜好集群活动，可以高密度的养殖，特别是池塘主养和网箱养殖；五是贪食，易垂钓，适合发展休闲游钓业。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。