查询词典 used sand

But it is at the stage of theoretic research in China The expandable sand screen technology is used for sand prevention in the downhole In fact, it is a series and intermesh axes slotting and the ar rangement of the slotting make the pipe string easy to ex pandable.

它是一种适用于井下防砂的膨胀筛管技术，膨胀防砂筛管实质上是具有一系列串联的、互相交错的轴向割缝的管子，割缝的布置使管柱更易于膨胀。

In order to overcome the defect of traditional methods and to find a new simply and effective time-domain method to eliminate the influence of boundary reflection. The main contents of studies and achievements are as follows: The liquefiable saturated sand dynamic character researches are conducted by means of the resonant column test and the dynamic tri-axial test; The undrain dynamic relationship between stress and strain, the damping ratio, saturated sand liquefaction mechanism, laboratory liquefaction standard, the effective factors of liquefaction are considered in laboratory. Liquefaction strength parameters used in element numerical simulation are obtained.

为克服传统方法存在的问题，寻求一种简单有效、能消除截断边界反射影响的时域有限元方法，本文主要开展了如下研究工作：对工程场地土体进行了标准贯入、静力触探、剪切波速等现场原位试验、室内动三轴试验以及共振柱试验，针对研究区域内可液化的饱和土进行了动力特性试验研究，分析了饱和土体的不排水动应力～应变关系和阻尼特性；对研究区域内的饱和砂土的液化机理，室内试验液化判别标准及影响饱和砂土液化的诸多因素进行了研究，得出了工程场地土体的抗液化强度指标等有限元模拟所需参数。

The tesinic sand is used in casting iton casting steel and nonferrous metal casting.the best is to use the original of the resinic sand.

用级少的粘结剂、即可得到最大的粘结强度，对铸铁、铸钢、有色金属铸件树脂砂用原砂最理想。

Company's main products are: R-type high-pressure milling machines, powder machines, straight-through processing impact crusher, counter-breakers, jaw crusher, shaker, sand washing machines and other products and stone crushing screening complete sets of equipment, Mechanism of sand used in construction of complete sets of equipment.

公司主要产品有：R型高压磨粉机，微粉机、直通式冲击破碎机、反击式破碎机、颚式破碎机、振动筛、洗砂机等系列产品及石料破碎筛分成套设备、建筑用机制砂成套设备。

The products include large-sized ball mill,large-sized rotary kiln, rotary dryer,complete cement plant, jaw crusher series, impact crusher series, sand maker series,feeder series,vibrating screen series,sand washing machine series,belt conveyor and other dozens of series,over one hundred models crushing,calcining and milling equipment, these machine widely used in mining,chemical,metallurgy,construction material,coal,refractory material industries and so on.

公司产品包括大型球磨机、大型回转窑、烘干机、成套水泥生产线、颚式破碎机系列、反击式破碎机系列、制砂机系列、给料机系列、振动筛系列、洗砂机系列、皮带输送机等几十种系列、数百余种规格的破碎、煅烧、制粉成套设备，广泛适用于矿业、化工、冶金、建材、煤炭、耐火材料等行业。

The calcium sulfate was dissolved and led to the rapid increase of calcium ion concentration in the solution. So the calcium sulfate is not suitable for being seed crystal of low-salt concentration. The quartz sand and calcium carbonate both can be used as seed crystals, but it is much faster and more complete to use calcium carbonate as seed crystal compared with using quartz sand.

当硫酸钙加入处理液中发生了硫酸钙溶解现象，导致溶液钙离子浓度迅速增加，故硫酸钙不适合做低浓度盐水的晶种，而石英砂和碳酸钙均能对钙离子的结晶起到效果，但碳酸钙做晶种对钙离子的结晶更快捷、更彻底，在条件允许的情况下，采用碳酸钙做晶种为宜。

XLP/A Cyclone dust collector is used to purify dusts such as tobacco、pencil stone、quartz、coal、pottery clay、casting sand、quartz sand、cement and etc.

XLP/A型旋风除尘器适用于净化烟草、滑石、石英、煤炭、陶土、铸砂、石英砂、水泥等粉尘。

In order to establish the relationship between iron casting defect s and clay mould sand properties used to provide in time forecast information of casting quality, a mould sand quality control system software based on C/S model was proposed.

为了构建型砂性能与铸件缺陷之间的关系，用以及时提供铸件预测信息，提出了一种基于C/S结构的型砂质量管理系统软件。

This paper outlines the basic principles,processes and equipments commonly used in V-process ,green sand and resin sand moldings.

文章介绍了目前常用的真空 V法造型、湿砂造型和树脂砂造型的基本原理、工艺过程以及所使用的设备，列举了它们的优缺点和经济的适用范围。

According to the different appearance, can be divided into Grass Valley, or sand used as a beautiful sand, pot-shaped bunkers, etc ...

根据模样的不同，又可分成草坑、用做美观或沙面沙坑、壶形沙坑等。。。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。