多砂的

The cooling rate is faster in chromite sand mold, but also causes more porosity in castings.

铬砂制作的砂模可让铸件有较快的冷却速率，但也产生较多的微孔隙。

The soil static and dynamic universal triaxial and torsional shear apparatus which can simulate the cyclic stress characteristic of sand on seabed is used to perform experimental tests of loose carbonate sand s with a relative density of 30% subjected to vertical-and-torsional coupling cyclic shear with the rotation of principal stress axes induced by ocean wave.

利用土工静力-动力液压三轴-扭剪多功能剪切仪模拟海洋波浪的加载形式，对相对密度为30%的钙质砂进行了扭转和竖向耦合循环剪切试验，着重研究了复杂应力状态下初始主应力方向角α0和中主应力系数b对钙质砂动强度特性的影响。

Lastly, sand and reef area were compared. Since reef areas has more suitable natural substratum than sand areas.

另外由较大的空间尺度来看，礁区与砂区为两个天然底质不同的区域，在这两个区域分别放置面积相同的附苗板时，由於礁区的天然底质数量较多，根据附苗强化效应，幼生在附苗板上的附苗密度应在砂区较高。

The result indicated that suitable thickness of paddy soil is about 15cm,and for dry arable land it should not be lower than 20cm;The alluvial rivers parent material is the best one to influent the output,the rice fields is the worst with the parent material of slate ground,while the dry and plough land is the worst for its purple sand shale parent material;The paddy rice is best with the acid soil,and the dry crop is the best with the neutral soil;The obstacles horizon exist in 35.2%of the rice fields in research region,and many for middle or top digit obstacles.

结果表明，水稻土的适宜耕层厚度为15 cm左右，旱耕地适宜耕层厚度应不低于20cm；成土母质对产量的影响以河湖沉积物母质最好，稻田以板页岩母质最差，旱耕地以紫色砂页岩母质最差；水稻以酸性土最好，旱作以中性土最好；研究区稻田有35.2%的存在障碍层，且多为中、高位障碍，是影响水稻产量整体提高的主要因素；水稻和旱作都以壤土为最好，其中，稻作怕砂，旱作怕粘；水稻土适宜的容重为1.00—1.29 g/cm~3。

There are several Atomatic lines,semi-automatic lines,could produce many kinds of shape bottles,and we also have other lines for:frosting,silk-screen printing,hot-stamping,polishing,color coating.with assistance to design glass bottle mould.plastic accessories aluminum accessories,pump and so on.

拥有多条全自动、半自动生产线，适合制造多规格、多瓶形的批量生产，并拥有配套：蒙砂、印刷、抛光、喷涂等深加工生产线；公司可协助客户设计制作玻璃模具、塑料配件、电化铝件、喷泵等配套服务。

The results of the investigation showed that the best entrance angle of B〓C, B〓C/ C and Al〓O〓/ C ceramic nozzles is 11°, 14°and 16°respectively. Erosion wear model has been put forward. The B〓C and B〓C/ C nozzles exhibited a stress fatigue induced removal process under the condition of umber emery erodent impacting, and a brittle fracture induced removal process under the condition of white emery and SiC erodent impacting.

建立了不同磨损机理下的冲蚀磨损模型，提出了喷砂嘴的磨损属于多冲蚀机理并存的复合冲蚀机制。B〓C和B〓C/C陶瓷喷砂嘴在棕刚玉磨料的冲蚀下，主要表现为应力疲劳断裂冲蚀，在白刚玉和SiC磨料的冲蚀下，主要表现为脆性断裂冲蚀。

States under the Sky Fling international co., Ltd., is a professional manufactory of car care products, we offer many kinds of car care products, including the auto under coating, glare professional polish, chipping rubber, engine surface degreaser, oil treatment, super oil treatment, pitch cleaner, 3 minutes motor flush, de-rust lubricating spray, car refrigerant, panel cleaner, multi-purpose foam cleaner, tyre foam cleaner, carburetor cleaner, glass cement, multi-purpose seal gum, seal gum for the sheet matel, radiator flusher, antifreeze, windshield cleaner, leather vinyl rubber protectant, Deluxe hard wax, Deluxe colour back wax and so on.

佛山市天翼发展有限公司隶属天翼国际有限公司，是专业生产销售汽车养护用品的企业，主要产品：底盘装甲、釉、粒粒胶、发动机外部清洁剂、发动机强力修复剂、超级机油精、柏油清洁剂、3分钟引擎洁霸、多功能锈蚀松动剂、汽车专用致冷剂SFA、表板蜡、多功能泡沫清洁剂、轮胎泡沫光亮剂、化油器清洁剂、玻璃胶、多功能密封胶、钣金专用密封胶、水箱清洁剂、防冻剂、雨刮精、高级固蜡、高级砂蜡等。

The result of our experiments showed that PAM has little effect on sandy soil. We analyzed that it is because there are little fine glutinosity soil grain in sandy soil.

研究结果初步表明，PAM在砂性土壤中的施用效果不佳，据分析，这是因为砂性土壤中细小粘粒含量较少，施加PAM后，不能形成较多的水稳性土壤团聚体。

The process of the nonexchangeable potassium release from the soil tested in 912 hours can be well described with linear equation.④ The constant B rate of the nonexchangeable potassium release from the soil tested is controlled by the content of clay and slowly available K.

关于非交换钾的释放动力学，Martin等已用几种微酸性砂质土和砂壤质土进行了初步研究［7～10］，国内在此领域研究不多，对中国北方广泛分布的黄土性土壤非交换钾释放动力学研究更少。

Among them the fault-lithology reservoir type is the most ,second is fracture reservoir,the least is fault reservoir,oil and gas distribution is mainly situated near or tip of the nose of Shangjia nosing structure. The relationship of oil and gas distribution is complex, dominately controled by sandbody and fault connection and the continuity of sandstone .

其中以断层—岩性油气藏最多，其次是断层遮挡油气藏，最少是断块油气藏，油气分布在平面上主要在尚家鼻状构造的鼻尖部位及其附近，油水分布关系复杂，主要受砂体与断裂沟通情况及砂体分布连续性的控制。

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。