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However, the ultimate mass of the star is determined both by the mass of the cloud out of which the star forms and by a number of feedback processes that occur during the evolution of the protostar.

然而,最终形成的恒星的质量是由恒星形成于其中的气体云的质量和星演化过程中的一系列反馈过程共同决定的。

The results show that: the tensile strength, flexural strength and flexural modulus increase by about 10.4%, 62.1% and 122.3% respectively when the mass fraction of the aluminum powder increases from 0 to 50%, while elongation at break and impact strength decrease by about 65.0 and 74.4% respectively; the tensile strength, elongation at break and impact strength all increase with decreasing the particle sizes of the aluminum powders.b Nylon-12 coated metal powders for the indirect SLS process were prepared by the dissolution precipitation process. The coated powders have only 1.0 wt% nylon-12, and their SLS green parts have sufficient strength for features as small as 1.0 mm to be built and post-processed and high dimensional accuracy. The green parts were subjected to the post processing processes including binder decomposition and infiltration of epoxy resin, and then the metal/polymer composite parts with relatively high strength and accuracy were formed.At present, micron-scale inorganic fillers have been widely used to reinforce nylon SLS parts.

将该法制备的尼龙12覆膜金属粉末用于以下两个方面:a使用铝粉增强尼龙12的SLS成形件,通过溶剂沉淀法制备尼龙12覆膜铝复合粉末,研究了铝粉含量及粒径对SLS成形件性能的影响,结果表明:铝粉分散均匀,并与基体有良好的界面粘接;当铝粉含量从0增加到50wt%时,成形件的拉伸强度、弯曲强度、弯曲模量分别提高10.4%、62.1%和122.3%,冲击强度和断裂伸长率下降65.0%和74.4%,耐热性及尺寸精度也得到提高;断裂伸长率、冲击强度及拉伸强度均随着铝粉粒径的减小而增大。b使用溶剂沉淀法制备了间接法SLS用尼龙12覆膜金属粉末,该覆膜粉末中聚合物粘接剂的含量仅为1.0 wt%,其SLS初始形具有较高的精度以及足够满足后处理要求的强度,最小精细结构的尺寸达1.0 mm。

Companies mainly engaged in precision machining of small and medium-sized steel precision forging gear blanks, wind, electric tools parts, CNC punch precision molds, cold extrusion products, such as pieces of the production, involving electronic products, information, automobile, motorcycle, the wind.

公司主要从事精密件加工、小型钢质精锻齿轮、风、电动工具零部件、数控冲床精密模具、冷挤压件等系列产品的生产,产品涉及电子、信息、汽车、摩托车、风。

On the principle of energy saving,environment protection and high efficiency,the process technology of nitrided manganese based on powder block was optimized.

在节能、环保、高效原则下,基于粉末压对氮化锰生产工艺进行了试验。

Using isothermal an nealing technology for gear forging stocks is an effective way of improving the gear driving accuracy. Explains in detail the isothermal annealing process, features and equipments necessary for the heat treatment.

认为采用齿等温退火工艺是提高齿轮传动精度的有效途径,详细介绍了等温退火工艺原理和工艺特征,还介绍了该热处理过程采用的设备。

As the market demand began to pick up the second quarter, Baoshan Iron and Steel billet material production of goods is rising.

随着二季度市场需求开始回暖,宝钢商品材产量逐步上升。

The glaze raw materials along with the correct amount of water added are ground for approx.

釉原料用台秤称重,装入桶内,按配方所需的配料在桶内混合。

The bloom, clasped by 3 large, green, lifelike bracts, consists of 5 greenish-white sepals, 5 white petals and a fringelike corona of straight, white-tipped rays, rich purple at the base.

,紧扣3个大,绿,栩栩如生苞片,共分5层的白色分类中, 5个白色花瓣和fringelike电晕直,白英报称光芒,紫色丰富,在基地里。

Then, thanks to the Portuguese discovery of the direct sea route to India, Antwerp flourished as a diamond center, as the city was well-situated to receive vast supplies of rough from Lisbon as well as from Venice.

由于葡萄牙人发现直通印度的海路,促使安特卫普蓬勃发展成为钻石中心。安特卫普优越的地理位置使它便于从里斯本和威尼斯进口大量钻

The blanks will have been well-fermented paste made into a paste according to taste brackish, it becomes miso.

而将已发酵好的酱根据口味咸淡制作成糊状,便成了大酱。

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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了

The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.

世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。