航空学的

During the actual production, that the oxygen contamination from the crucible material by heat composition increases the oxygen content of molten steel will result in melting losses of the alloys in the molten steel, and will results in more heavier melting losses of the alloys, incontrollable exact chemical content of molten steel, increment of oxide inclusions and bad processability and serviceability, especially in the high strength(σb≥1600MPa) steels and alloys with special performance used in aerospace industry, manufacturing industry for precision instruments and meters, military industry, nuclear industry etc. because these steels usually have a high content of some active alloys such as Ti, V, Nb, Al, RE, etc. and a nearly zero content of dissolved oxygen.

实际生产中，如果炉衬热分解向钢液供氧，势必会造成钢液中合金元素的烧损，尤其是在航空航天、精密仪器仪表制造、军工及核工业部门使用的某些具有特殊性能的高强度(抗拉强度σb≥1600MPa)合金或钢材，因它们通常需要具有较高的活泼合金元素(如Ti、V、Nb、Al、RE等)含量，且钢中溶解氧含量接近于零，炉衬热分解供氧将造成这些合金元素的大量烧损，其结果是钢液化学成分难以精确控制，并增加了氧化物夹杂含量，恶化了钢的加工和使用性能。

On the hopeful 21st century, the rapid development of information, biotechnology, energy resources, environment, advanced manufacturing technology and national defense have produced the new demand for materials. More and more small size of materials will meet the demand of miniatured, intelligent, highly integrated, densely memorized and super fast transmission element. Aerospace industry, up-to-date military equipment, advanced manufactured technology and so on has required better and better properties.

中文题名有机高分子－无机纳米复合粒子改性高分子材料的力学性能－相态与群子标度之间关系的研究副题名外文题名 Studies on the relationship of mechanical properties-morphology and sub-cluster parameters of polymer materials modified by organic polymer-inorganic nanocomposite particles 论文作者权英导师金日光教授学科专业材料学研究领域\研究方向学位级别博士学位授予单位北京化工大学学位授予日期2002 论文页码总数177页关键词纳米材料高分子材料纳米复合材料纳米粒子馆藏号BSLW /2003 /TB383 /7 在充满生机的21世纪，信息、生物技术、能源、环境、先进制造技术和国防的高速发展必然对材料提出新的需求，元件的小型化、智能化、高集成、高密度存储和超快传输等对材料的尺寸要求越来越小；航空航天、新型军事装备及先进制造技术等对材料性能要求越来越高。

We raise large employee continuously in the meantime of the character technique level, give employee of good study satge, made use of the CAD/CAE/CAM software in great quantities, promised a product effectively of period quality, product with involve to the daily necessity, the appliance industry, automobile, medical treatment, IT, aviation etc., special at double the color note the molding tool and the high light optical molding tool realm our company to be placed in industry of before row, already successful is second for Peking to all add a wet machine, the German CRISTIN STEMKE Sweden AD/PLAST, the Italian motorcycle waited the local and foreign factory house to provide molding tool and product.

同时我们不断的提高广大员工的素质技术水平，给予了员工的良好的学习舞台，大量的运用了CAD/CAE/CAM软件，有效的保证了产品的周期质量，产品以涉及到日用品，家电业，汽车，医疗，IT，航空等，特别在双色注塑模具及高光光学模具领域我们公司处于业界的前列，已成功为北京亚都加湿器，德国CRISTIN STEMKE 瑞典AD/PLAST，意大利摩托车盔等国内国外厂家提供过模具以及产品。

In this section we look at the theory behind the techniques used in rotary polishing and the effects that they have on paintwork and the results achieved.

在这里看抛光剂使用背后的理论，到底是怎么一回事，我们如何用好的抛光机和好的使用技巧来达到好的效果。

I'll dig like a psychotic rodent if I have to.

那我就帮你挖到中国去。