Swallow of the northern hemisphere that nests in tunnels dug in clay or sand banks. 北半球燕子,在粘土或沙坝中挖洞筑巢。
It is the key to guarantee stable and consistent quality of clay molding sand in mass-production of sand castings. 稳定地保证粘土型砂质量是大批量粘土砂铸造生产中的关键问题之一。
By decreasing the grade of cast iron, using furan resin selfsetting sand as a substitute for clay sand to make the core and prolonging cooling time in mould, the cracking problem has been solved. 通过降低材料牌号,使用呋喃树脂自硬砂取代粘土制芯,延长铸件在型内冷却时间,使裂纹缺陷问题得到解决。
Problems on Automatic Test and Control of clay sand properties 粘土砂性能自动检测与控制中的若干问题
In clay and sand habitats, there is not significant difference except the underground biomass. 在淤泥质与沙质中,除地下生物量外,其它形态因子与生物量之间没有显著差异;
Graves are a mix of gravels, clay and sand carried out by the river. 它混合着碎石、土和河流带来的沙子。
Study on the Technology of Reclaimed Used Clay Sand for Sodium Silicate Bonded Sand 再生粘土砂用于水玻璃砂工艺的实验研究
The company, owning expert stuff in manufacturing and selling sand preparation equipments for foundry, is well known as specialization in the complete sets of resin sand and clay sand equipments. 另外,公司拥有多年来以制售优质铸造砂处理设备而闻名的专业队伍,专业生产铸造车间的树脂砂、粘土砂成套设备。
This cylinder was composed of a mixture of clay and sand, with the addition of a little hay and straw. 这个圆柱是用掺了干草和麦秸的粘土和细砂做成的。
A rudaceous rock consisting of sharp fragments embedded in clay or sand. 尖角的碎石嵌入粘土或沙而构成的砾质岩。
Through the simulating experiments, it was considered that the degree of difficulty of decoating reclamation for a particular used clay sand could be reflected by the amount of moisture and clay contained in this sand. 通过模拟实验,认为粘土旧砂的水分及其合泥量,可反映出这种旧砂脱膜再生的难易程度。
According to this, the authors analysed the results of the experiments and the practical mixing techniques of clay molding sand were suggested. 并在双目显微镜下,全面观察了不同混碾顺序下,砂粒表面粘土膜包覆状况,依此对实验结果进行了分析。并对实际生产中,粘土类型砂的混制工艺提出了建议。
Casting quality and rejection rate are remarkably affected by the quality and property of molding sand, in the process of clay sand green mold casting. 在粘土砂湿型铸造中,型砂质量和性能对铸件质量、废品率有明显的影响。
Application of Old Sand Cooler in Clay Sand Casting Production 旧砂冷却器在粘土砂铸造生产中的应用
In this paper, the load capacity ( both the horizontal and vertical load capacity) formulas for single chambered suction pile set up in clay and sand, respectively. 本文主要针对在粘土或砂土中,在不同的约束条件下,分析吸力桩水平承载力和垂直承载力的计算方法,并进行理论研究。
Effect of Clay and Sand Grade of Muddy Water on Its Characteristics of Intermittent Infiltration 泥沙粒度组成对浑水间歇入渗特性的影响研究
The interbed of red clay and sand layers wascorrelated to L4 in loess-paleosol sequence. 地层对比中将红粘土与细砂互层与黄土沉积的L4相对应。
The Economic Benefit Analysis by Comparison Between Resin Sand and Clay Sand 树脂砂工艺与粘土砂工艺的经济效益对比分析
According to the practical situation of foundry production in China, technique of clay sand reclamation by heating gasis presented to solve the reclaiming problems of used clay sand in green sand casting by large scale production. 根据我国铸造生产的实际情况,提出采用加热气流再生粘土旧砂的方法,解决铸件大批量生产湿型铸造粘土旧砂再生问题。
Experimental Research on Reclamation of Clay Sand with Resin-Bonded Core 含树脂芯砂的粘土砂再生方法试验研究
In-situ measurement of bridge foundation located underwater sediment soft clay and sand by using GA pressuremeter is introduced. 介绍了GA型预钻式旁压仪在水下沉积软土及砂土桥基原位测试中的成功应用。
The China fir grows well at basalt and quartz sandstone, but poor at clay and sand shale. 其中以玄武岩与石英砂岩发育的土体上的杉木生长最好,依次为长石石英砂岩与变余砂岩,而以煤系砂页岩和第四纪红色粘土上的杉木生长最差。
Analysis of consolidation deformation of layered saturated clay with sand drains 层状饱和粘性土砂井路基的固结变形分析
The Effect of Ambient Temperature and Used Sand Temperature on Clay Mould Sand Performances 环境温度和旧砂温度对生产线用粘土型砂性能的影响
Factors Affecting Clay Sand Performances in Line Production 影响流水线生产粘土型砂性能的因素
Experiment of Using Rollers with Double Flanges to Mix Clay Sand 双凸缘辗轮混制粘土砂的初步试验
There are also a higher contents of very fine sand, clay sand and fine sand, but there are lower content of coarse sand and medium sand. 细砂、极细砂及细粉砂的含量较高。粘粒、中砂、粗砂及胶粒含量较低。土壤上部粒度较细,下部粒度略变粗。
Especially in recent years, with the organic binder of the widely used, so that a large number of resin core sand mixed in the used clay sand, and take shape the clay ( mixed) used sand. 尤其是近年来,随着有机粘接剂的广泛应用,使粘土旧砂中混入了大量的树脂芯砂,形成粘土(混合)旧砂。
Results show that: Sediment types in Jiaozhou Bay include sand, silty sand 、 clayey sand 、 sandy silt and clayey silt, silty clay and sand silt clay. 研究表明:1.胶州湾的底质类型分别包括砂、粉砂质砂、黏土质砂、砂质粉砂、黏土质粉砂、粉砂质黏土、及砂-粉砂-黏土等七种类型。
Silt is different from clay and sand and has its unique engineering properties. 粉土既不同于粘土,又有别于砂土,具有独特的工程性质。