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1)  20 steel
20钢
1.
Effect of tensile strain rate on spall fracture in 20 steel;
拉伸应变率对20钢层裂特性的影响
2.
TiC penetration and depositing on 20 steel surface by double-glow plasma alloying;
20钢表面双辉渗镀TiC陶瓷
3.
Flashing butt welding between ferrite spheroidal graphite cast iron and 20 steel;
铁素体球墨铸铁与20钢的闪光对焊
2)  20# steel
20#钢
1.
Taking 20# steel commonly used in heat exchanges as a study object,its anticorrosion of hot-dip aluminizing was researched.
选取换热器中较为常用的材质20#钢作为研究对象,研究了20#钢热浸镀铝的抗腐蚀性能,使用便携式瞬时腐蚀速率测量仪对20#钢热浸镀铝前、后的试样在酸性腐蚀介质和碱性腐蚀介质中的年腐蚀速率进行了测试。
2.
In recent years, thinking of working safe, 20# steel is applied to significant construction project in the homeland more and more, especially to burying field facilities, therefore, The study on 20# steel’s corroding law and forecasts has very strong theory significance and gigantic realistic value.
近年来,出于对安全运行的考虑,20#钢正越来越多的被应用于国内重大建设项目的工程实践中,尤其是被应用于埋地设施中,所以对20#钢在土壤中的腐蚀规律及预测的研究具有很强的理论意义和巨大的实际应用价值。
3.
The tribological properties of GCr15 steel ball against 20# steel disc under unlubricated condition and lubrication of plant oil containing nano calcium carbonate particles were investigated on the Universal Micro-Tribometer.
利用微观摩擦学试验机测定了干摩擦、基础油润滑、添加纳米CaCO3的基础油润滑状态下GCr15钢/20#钢摩擦副的摩擦系数-时间关系曲线,比较分析了三种摩擦条件下曲线的变化规律及影响摩擦系数的因素。
3)  steel 20
20钢
1.
Production practice on casting the round tube blank of steel 20 with round tube blank continuous caster
圆坯连铸机浇铸20钢铸坯的生产实践
2.
The morphology and formation mechanism of the microstructure of the composite ion-nitrided plus chromized layers obtained at various chromization temperatures in a plain low-carbon steel (steel 20) were investigated using metallography, X-ray diffraction and microanalysis.
应用金相、X射线衍射和微区成分分析研究了20钢经离子氮化后在不同温度渗铬(复合渗铬)所得渗铬层的显微组织及其生成机制。
3.
The microstructure and fracture morpholo gy of steel 20 were studied using scanning electron microscope (SEM) and X-ray diffractometer (XRD).
利用光学显微镜、扫描电子显微镜及X射线能谱仪对20钢火药筒失效样品的断口形貌和显微组织进行了分析。
4)  AC-20Ⅰ
AC-20
1.
Problems of the Mix RatioTest of AC-20Ⅰ Asphalt Concrete;
关于AC-20沥青混凝土配合比试验的几个问题
5)  20 years
20年
1.
Since the 1980s,the world community development and the rule of law entered a new phase;under this background,great progress are made in administrative control legislation both in the mainland and Taiwan in nearly 20 years,in the process of the rule of law exists larger comparability.
20世纪80年代以来,世界各国社会发展和法治发展进入了一个新的阶段,在这一大背景下,大陆与台湾地区近20年在行政控权立法方面均取得了较大的收获,而且在法治进程方面存在着较大的可比性。
2.
In the 20 years from 1981 to 2000 in China, the teaching pattern research ran through three stages of introduction, theoretical exploration and pattern construction and its content covered the concept, structure, features, function, category, choice, application and construction.
从1981年到2000年的20年里,我国的教学模式研究大体经历了以介绍引进为主、理论探索为主和模式建构为主三个研究阶段,研究的内容涉及教学模式的概念、结构、特点、功能、分类、选择、运用与建构诸方面。
3.
The result indicated: during 20 years the Korean National Minority student\'s growth level has certain scope to enhance, after before the growth rate and the speed performance are“, quick, slow”the characteristic, the student build already started from“the bean sprouts”to approach the transformation“symmetrically”.
利用吉林省1985、1995和2005年朝鲜族学生体质调研数据,采用文献资料法、数理统计法和专家访谈法,对朝鲜族学生体质状况作20年动态观察、对比和分析,目的为中国朝鲜族学生体质健康水平的提高提供科学依据。
6)  1920s
20世纪20年代
1.
On the Education Reform in Zhejiang in the 1920s;
20世纪20年代浙江省的教育改革
2.
Space for Modern Essays in North-East China in 1920s;
20世纪20年代东北现代散文空间
3.
A Study on the Chinese Economic Thought of Cooperation in 1920s;
20世纪20年代中国的合作主义思潮论析
补充资料:A3钢试片在济南埋20年后的腐蚀情况


A3钢试片在济南埋20年后的腐蚀情况


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说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条: 20管钢  20世纪初 
 
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