查询词典 sand blast

However, the company continuously suffered from the non-profitable operation, which troubled Mr. Robert Fitzsimmons. Due to the high cost on oil sand productions and limited financing available, the company often failed to cover its end needs, which led to its bankruptcy by the end of 1930s. In 1948, Bitumount plant was received by the government, and became a dedicated oil sand test base. Large-scale facilities were equipped, thus expanded the scale of oil sand experiments on oil extraction. By 1949, the plant reached a production capacity of 450 tons per day!

但是公司惨淡的经营状况却一直是困扰Robert Fitzsimmons的问题，由于当时的油砂开发成本太高，资金来源又非常有限，公司的财务状况经常是入不敷出，终于导致公司在30年代末破产。1948年，Bitumount的工厂被政府接管，作为专门的油砂实验基地，并为之添置了大型的设备，将油砂的开发和萃取实验规模扩大。1949年工厂的生产能力已经达到日处理油砂450吨！

Based on analysis of the current development of sand and wind in Zhangjiakou and Chengde regions,the paper puts forward some sug- gestion in preventing sand in the work,according to the condition of nature,geography and society economy on different type areas in Hebei Prov- ince,such as the model of control sand.

在分析张家口、承德地区风沙形成原因及发展趋势的基础上，提出了河北省防沙治沙工作中存在的问题，根据河北省不同类型区的自然、地理及社会经济条件，提出了风沙治理模式和建议。

So the ginger bumped milk to spread to open in the sand gulf, the sand gulf the person call the "condense""cover up" hence"the ginger bump milk" also call"the ginger cover up milk" in the sand gulf.

因此姜撞奶就在沙湾镇流传开了，沙湾人把"凝结"叫"埋"于是"姜撞奶"在沙湾也叫"姜埋奶"。

Ordinary sand casting including greensand, dry sand mold, chemistry hardening sand mold three kinds.

普通砂型铸造包括湿砂型、干砂型、化学硬化砂型三类。

Our research depends on the advantage of cross-knowledge and makes a research on this subject by Gas-Solid Hydromechanics theory and PTV measure technology. Our research tries to understand sand incipience and wind-sand flow structure, find a new way to research the wind-blown-sand flow.

本论文发挥交叉学科的优势，采用气固两相流体力学理论和PTV测量技术研究这一现象，从新的角度认识沙粒起动和风沙流结构，为风沙流动的研究打开了新的思路。

Our research analyzes desert phenomena and physiognomy characteristics with Gas-Solid Hydromechanics principles. The typical phenomena include sand incipience, sand ripple and sand erode.

使用流体力学的基本原理解释沙漠中的沙粒起动、沙纹形成和沙蚀等常见现象和地貌特征。

Floor of entire county total ground accumulates 4885 square kilometer, climate characteristic is spring dry sand blown by wind is much, the summer is short rainfall is little, year average air temperature 2.5 ℃, fall 350mm is controlled, frost-free period is controlled 110 days, it is typical dry farming county, long-term since, because the ploughshare type of follow tradition plows cultivation, a large number of the earth's surface are completely bare, monsoon comes, soil land of medium fine sanded face is reached organic blow character, cause edaphic sand to change, fertility drops, raise of sand and dust, year answer a year, change dene serious with each passing day, cause aggravation of zoology environment year after year, the agriculture that also decided place produces a condition, groundwater source is not worth badly, 10 years of 9 drought, extensive cultivation, crop yield is low and flabby.

全县总土地面积4885平方公里，气候特色为春季干燥风沙多，夏季短促降雨少，年平均气温2.5℃，降水量350mm左右，无霜期110天左右，是典型的旱作农业县，长期以来，由于沿袭传统的铧式犁耕作，大量地表完全裸露，季风来临，将土壤中的细沙面土及有机质刮走，造成土壤沙化、肥力下降，沙尘扬起，年复一年，沙化日趋严重，造成生态环境逐年恶化，也决定了当地的农业生产条件，地下水源严重不足，十年九旱，广种薄收，作物产量低而不稳。

Firstly, based on the force acting on a single-particle, establish a discriminant formula of the sand threshold, and prove that the sand threshold belongs to the cusp catastrophe. Then establish the basic equation of the cusp catastrophe using coordinate transformation and catastrophe theory. Finally, while particle Reynold number and equivalend diameter are the state variables and Shields parameter is the control variables, we can obtain the model of cusp catastrophe of sand threshold, putting those variables into the basic equations of the cusp catastrophe. The model is derived from the mathematics, which has a certain mathematical theory foundation.

首先从单颗沙粒受力分析出发，建立沙床沙粒起动条件判别公式，进而证明了风沙起动属于尖点型突变；然后通过坐标变换和突变理论建立了尖点突变的基本方程；最后本文选择颗粒雷诺数和等效粒径作为控制变量，希尔兹参数作为状态变量，并把它们代入尖点突变的基本方程，经过拓扑变换得到风沙起动的尖点突变模型，并与前人的公式及实验数据进行比较。

Sand belt, sand paper and abrasive product, diamond sand wheel, Pitch cutting, Black lead cloth, etc.

砂带、砂纸及及其异型产品，石墨布、树脂、陶瓷砂轮、树脂切割片、金刚石砂轮等。

Wind erosion in the region, should be taken to the development of water resources, water Lassa, planting trees and grass, set up artificial sand barrier and the Green Belt Network, and other measures to establish a sand-fixing system of protection and control against the sand.

在风力侵蚀地区，应当采取开发水源、引水拉沙、植树种草、设置人工沙障和网格林带等措施，建立防风固沙防护体系，控制风沙危害。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。