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Abstract: The stator's inner suface of vane pump is very complicated.When machining the su rface,special profile grinding machine.
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文摘:叶片泵定子曲面的形状比较复杂，修磨时往往需要专用仿形磨床。 |
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Abstract: The stimulation treatment of "loosening rock by the dilatancy of explosive waves" is tested in the casing well 4242 for studying its result and its influence on casing.The result of the field test shows that this test is successful in
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文摘:为了研究“压胀松动”增产技术的增产效果和对套管的影响,在延长石油管理局子长油矿对4242井进行了现场实验.该技术采用强动载波在地层深处叠加的方法,造成压胀条件,松动岩石,增大近井带渗透率,提高油井产量.施工后,该井产量增加为原来的4倍多.本次实验工艺上是成功的,首先是按设计要求引爆了炸药,其二是由于采取了保护措施,使套管变形局限在施工段处,不影响下泵,不影响油井生产;套管强度校核分析也证明了套管不会破坏.施工后地质效果明显. |
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Abstract: The structural characteristics, properties, main preparation methods of bulk nanocrystalline materials, and their application and development prospect in material engineering are introduced.
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文摘:介绍了大块纳米晶材料的结构特性、性能、主要的制备方法以及纳米晶材料在工程中的应用前景。 |
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Abstract: The structure and operating principle of triangulation probe are firstly briefly introduced in the paper.The analysis and derivation for the reflection property of metal surface are carried out.Several existed problems and solving schemes for me
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文摘:首先简单介绍了三角法测头的结构和工作原理，对金属表面的反射特性进行了分析和推导，提出了三角法测量金属表面时存在的几个问题以及解决方案。 |
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Abstract: The structure and the properties of the grinding ball made of the composite cast iron have been researched in this paper.The result indicates that added trace boron and a proper quantity copper to this kind of composite cast iron can increase it
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文摘:研究了一种复合铸铁磨球的组织和性能，结果表明，化学成分和淬火工艺对这种复合铸铁磨球的组织和性能有很大影响，微量的硼和适量的铜可以明显地提高磨球的淬透性，经过余热淬火得到贝氏体或马氏体基体组织，从而提高磨球的硬度和冲击韧性。 |
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Abstract: The structure static analysis of jack-up platform"Ganghai No.1"is carried out by using finite element method.This work includes the optimization of the structure calculation model,the analysis of the calculating result and the predicti
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文摘:介绍了利用有限元法对“港海一号”自升式钻井平台进行结构静力分析的情况，其中包括计算模型的优化，静力分析揭示的平台结构内力分布特点，以及对平台强度刚度的准确预报等。 |
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Abstract: The structures of the school physical education teaching contents,such as the structures of physical fitness sport,competitive sport,health protection sport and the structure of knowledge,methods and technique as well as the arrangement structur
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文摘:通过对学校体育教学内容的健身体育、竞技体育、保健体育结构，知识、方法、技术结构以及不同学段层次性结构进行了研究，旨在从新的视角探讨学校体育教学内容的结构，防止在体育教学改革中，对体育认识的片面性、单一化，影响学校体育整体功能的实现。 |
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Abstract: The study of Pingwu cattle――The ecological factor of the main place of origin,its appearance,its body measurements and the comparison with other cattle breeds in Sichuan,Shows that,in body measurements,appearance,and body measurements index,Ping
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文摘:对平武黄牛主产区生态条件的调查、外貌的观察和体尺的测定，与四川现有黄牛地方品种的比较分析，结果表明平武黄牛在体尺、外貌、体尺指数等方面有别于其它黄牛品种，是川西北山区良好的役用型黄牛种群，具有向役肉兼用型方向发展的优良特性。 |
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Abstract: The subject build is a focal point of hospital technology build.
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文摘:学科建设是医院技术建设的着眼点。 |
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Abstract: The subject is reviewed on the value of low chilling peach and nectarine varieties,breeding history,breeding characters,genetic background,breeding objective and introduction of the advanced varieties as well as the breeding objective in China.
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文摘:从短低温桃、油桃品种的价值、育种历史、特点、遗传背景、主要育种目标和优良品种介绍等方面概述了短低温桃品种的研究进展，提出了我国短低温桃育种的目标。 |
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Abstract: The summarization and tromsformation of the heattreatment circle of Shanghai are dwelled shorty upon in this paper as well as the forecast of market.The plan and proposal of the trade plan are presented as well.
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文摘:简要分析了上海市热处理行业概况，热处理行业发生的变化，市场预测与需求，提出了行业规划思路和目标建议等。 |
