反复试验

A series of erosion-corrosion test has been done to J55 steel under the influence of current of gas-liquid phase by indoor self-made devices, and the corrosion mechanism of current of gas-liquid phase to oil pipe's inner surface has been got. The results show that oil pipe's inner surface will be corroded fleetly by liquid medium and corrosion products will form on it. But at the same time, the corrosion products or protective layer will be removed from the inner surface of steel pipes under the alternate impact of high speed gas and liquid flow, and on this bare steel surface corrosion film will form again and be removed again. Thus, by these ways the corrosion is exacerbated. Surface erosion-corrosion failure comes into being with the circulation of this process going on.

本文主要在气液两相流作用条件下，通过室内自制装置，对管材钢J55做了系列冲刷-腐蚀试验，结果表明，气液两相流对钢管内表面冲刷－腐蚀的机理是钢管内表面会受到液体介质的快速腐蚀，生成腐蚀产物，同时钢管金属表面不断被具有高流速的气液相交替地冲击，不断地从金属表面脱去保护膜或腐蚀产物，裸露的钢表面又会被介质快速腐蚀形成腐蚀膜后，再被两相流冲掉，如此反复，造成管内金属表面膜的连续破坏，使腐蚀加剧，最终导致钢铁表面的冲刷腐蚀失效。

Herbalife Herbalife products, the source of skin-dimensional characteristics of the The product is world-renowned experts in plant ecology, the international hotspots of biodiversity and communities artificial Association, the Chinese Academy of Sciences, former director of the Kunming Institute of Ecology Professor Feng Yaozong, according to the principles of ecology combination of traditional Chinese medicine theory, the use of modern high-tech means After more than four decades of observation, research, filter selection and repeated clinical trials, the selection of tropical rain forest in Xishuangbanna, Yunnan climate unpolluted virgin forest in the unique natural refined from wild plants.

该产品是由世界著名植物生态学专家、国际热区人工群落与生物多样性协会主席、中国科学院昆明生态研究所原所长冯耀宗教授，根据生态学原理结合传统中医学理论，采用现代高科技手段，经过四十多年的观察、研究、滤选、反复临床试验，精选云南西双版纳热带雨林气候下未受污染的原始森林中特有的天然野生植物精制而成。

The writer puts forward that augment of coefficient can be used to determine the control point of displacement based on datum and the test of PCFS s(prestressed concrete frame structures) resistance under lateral reversed cyclic loading and hysteretic behavious.

通过对预应力框架结构在竖向荷载及水平低周反复荷载作用下的试验研究、全过程滞回分析，提出用增大系数法确定位移控制

First Hospital of Wuhan City Centre laboratory YU Nan, director of pharmacists before the task force after three years concentrated study and repeated a lot of animal testing, from the perspective of molecular biology, found purslane water extract in a brain injury protection , To anti-aging, enhance immunity.

武汉市第一医院中心实验室余南才主任药师的课题组经过3年潜心研究，反复进行大量的动物试验，从分子生物学角度，发现马齿苋水提液可在脑组织损伤中起到保护作用，能抗衰老、提高免疫力。

Cracks may be formed by repeated successions of immersion and drying ,the number of cycles at which the cracks are observed shall be noted in the test report.

反复的浸湿和干燥的过程可能会造成裂口。发现裂口产生时对应的周期数应当在试验记录中加以标注。

A theoretical analysis and experimental research on the performance of cast steel joints subjected to cyclic loading is carried out in this paper.

本文对反复荷载作用下铸钢节点的受力性能进行了有限元分析与试验研究。

Through the detailed analysis, the test results of SRC column specimens with different ratios of axial compression, steel skeleton and stirrup, the failure modes, the hysteresis characteristics, the ductility, the stiffness degradation and the energy dissipation capacity are specially discussed.

进行了6根内配方钢管的钢骨混凝土柱低周反复荷载试验，对轴压比、配骨率及配箍率等因素对钢骨混凝土柱滞回特性、延性、刚度退化和耗能性能的影响进行了分析，提出了保证钢骨混凝土柱延性的一些措施。

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。