超细的

The results showed that the three kinds of prealloy powder have excellent low temperature sintering characteristics and good wear resistance. They have excellent physical and mechanical characteristics close to ultrafine cobalt and imported prealloy powder, good retention to diamond and excellent bonding momental for high frequency brazing. At one time, they have lower cost and reduced dosage.

结果表明：三种预合金粉末有着优良的低温烧结性能和耐磨性，表现出接近于超细钴和相当于国外代钴粉末的优良的物理、机械性能，对金刚石把持力高；具有高的高频钎焊结合力矩；粉末成本较低，用粉量可降低。

The experiment results show that the yield of hexane catalyzed by the nano-fibrous catalyst was 4.7 times higher than that of PdCl_2/γ-Al_2O_3 catalyst. The hydrogenation ofα-tetradecylene, cyclohexene, nitrobenzol and styrene by the nano-fibrous catalyst was also studied, the selectivity to primary products of the hydrogenation of cyclohexene, nitrobenzol and styrene was 100%.

苯乙烯-丙烯腈共聚物负载纳米钯超细纤维形态催化剂在常温，氢气压力101.3Pa下催化α-己烯加氢时表现出很高的活性，催化剂PSAN-Pd10催化氢化α-己烯选择生成正己烷的产率在150 min就达到87%以上，与无机物负载的催化剂相比，加氢效果有显著提高，并且催化剂的重复使用性较好。

The results show that besides structure diversity of grinding machines, the properties, feeding quantity, partile size and water content of materials and grinding time have influence on their ultrafine grinding.

实验研究表明，影响粉碎效果的因素除了粉碎系统本身的结构差异外，还有物料的性能、粉碎时间、给料量、原料的粒度以及物料含水量等因素对中药超细粉碎有重要影响。

In this report,ultra-fine diamond powder after rough purification was used as raw material,of purification ,some kinds of reagents,such as cerium,fluoride and persulphate,were are selected to test their effects of purification .

以工业生产的粗提纯人造超细金刚石微粉为原料，从提纯原理的基础出发，采用铈盐、氟盐、过硫酸盐等试剂进行了提纯实验，并对每种试剂的实验结果、提纯工艺等进行了综合的分析比较。

Hydraulic overflowing separation is a high degree of accuracy solution of powder gradation. Single-site distribution of powder can be obtained by hydraulic overflowing separation, which can be used on abrading and polishing technology.

水力溢流分级精度较高，是目前常用的超细颗粒分级方法，通过溢流分级，可以将研磨后的粉体分级成为某一特定粒度分布的粉体，以适应研磨抛光等行业对粒度分布的要术。

In this paper, a number of procedures were designed for studying the mechanism of forming hard agglomerates of Z〓O〓 powders, and the properties of resulting powders were investigated extensively.

研究超细粉末团聚体的形成机理、寻找控制粉末团聚状态的工艺方法是〓性能陶瓷制备理论与技术的焦点，是个十分重要的研究课题。

In this paper, several coloring pigments were synthesized and the sheet metal powders were coated by these pigments with the technology of super powder preparing and particle compositing. The coated composite particles were prepared by these, and the metallic luster of the metal powders were defiladed. The mechanism and the processing conditions of composite particles were researched.

本论文以超细粉体制备及粒子复合技术为基础，在金属粉表面包覆一层红外透明性较好的着色颜料，遮盖金属粉的金属光泽，制备出包覆式复合粒子，对复合粒子的制备的机理及工艺条件进行了研究。

In order to develop of study of the substitute of HALON, the paper analyzes development history and theory of extinguishing of water, and presents theory of fire exterminating of water fog and air and new idea.

为了推动卤代烷替代的研究工作，分析了水灭火系统的发展历史和灭火机理，提出了超细气水雾灭火系统的灭火机理和系统设计的新思路。

Acicular ferrite microstructure in micro-alloyed steels, which nucleates around non-metallic inclusions, especially oxide inclusions, has high strength and good toughness and possesses strong grain-refining ability by itself. The ultra-fine grained steel with excellent weldability is likely to be produced by forming in materials a great number of fine and dispersive micro-inclusions which is helpful to induce AF to nucleate around them through oxide metallurgy technology.

微合金钢针状铁素体组织强度高、韧性好，在奥氏体晶内非金属夹杂物上诱导形核，具有很强的自身细化晶粒的能力，通过氧化物冶金技术控制钢铁材料形成大量细小、弥散，具有诱导AF形核能力的有益微夹杂物，有望获得焊接性能优良的超细晶粒钢。

Linear change after baking of the gunning mix which takes clay and bauxite as aggregates and high alumina cement as binder can be obviously reduced by adding 30% alumina fine powder and 5% kyanite.

在以焦宝石、矾上熟料为基本骨料，以高铝水泥等为复合结合剂的喷补料中加入3％的Al2O3超细粉或5％的蓝晶石粉都有利于降低喷补层的烧后线变化。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。