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To enhance their photoelectric conversion efficiency, the SnO_2 powders' surface was modified by zinc acetic. The results shows that surface modification significantly improve the cell's photoelectric conversion efficiency.

为了提高其光电转化效率，用乙酸锌在SnO_2表面进行了修饰，大大改善了电池的输出性能。

This study refers to the conditions of practical powder metallurgy manufacture process, and proceeds to experiments and gear precision measurements as well as investigation on the effects of two parameters, powders and pitch circle radius, on gear precision. The relationship between gear parameters and gear surface deviations was derived from the mathematical model for the involute helical gears and the analysis of gear surface deviations.

本论文将采用实际上粉末冶金螺旋齿轮的制程条件，进行试作实验与齿轮精度的量测，以探讨粉末及螺旋齿轮之节圆半径这两个制程参数对於齿轮精度的影响；同时应用齿轮创成原理所推导之螺旋齿轮数学模式，配合齿面变异分析，求得齿轮设计参数改变量与齿面变异量之关系。

The influence factors on the formation of platelike crystalline α-Al2O3 powders were investigated by XRD and SEM.

本研究以工业氢氧化铝粉体为原料，加入矿化剂和晶种，通过高温固相反应制备出分敌均匀的片状α-Al2O3粉体。

Preparation of platelike CaCO_3 by emulsion method;2. The influence factors on the formation of platelike crystalline α-Al2O3 powders were investigated by XRD and SEM.

本研究以工业氢氧化铝粉体为原料，加入矿化剂和晶种，通过高温固相反应制备出分敌均匀的片状α-Al2O3粉体。

" Cypress together benefit the 斯 tooks a look cup carefully, having already tooked a look an oneself's hand to say with smile, I know why:"Ising the top of the my hand is these platinum black powder reasons, these powders make the alcohol in the grape wine(note:The scientific term is called ether)have chemical reaction with the oxygen in the air, born the cause of acetic acid.

" 柏齐利阿斯仔细的看了看杯子，有看了看自己的手笑着说，我知道为什么了："是我手上这些铂黑粉末原因，这些粉末使红葡萄酒里的酒精与空气中的氧气起了化学反应，生成了醋酸的缘故。

The method adopts powders (10.0 parts of mass) of crop straws and phenols or polyalcohol compound (10 to 100 parts of mass) which is firstly pre-heated by 10 to 30 minutes under a temperature of 30 to 200 DEG C with the effect of acid catalyst (0.5 to 10 parts of mass) for a reaction of 30 to 240 minutes; after the reaction, the compound is washed, neutralized, filtered and dried to obtain a solid appearing as a color from citron yellow, yellow, bight brown to seal brown; wherein, the solid includes 64.0 to 70,0 percent of fibrin and 4.1 to 7.6 percent of lignin.

秸秆"液化"预处理制备生产燃料乙醇原料的方法，是用农作物秸秆的粉末(10.0质量份)和酚类或多元醇类化合物(10～100质量份)，在酸性催化剂(0.5～10质量份)存在下，在30～200℃温度下预热10～30min后，反应30～240min，反应完毕进行洗涤、中和、过滤和干燥而得呈淡黄色-黄色-浅褐色至深褐色固体，其中，纤维素含量64.0～70.0％，木质素含量4.1～7.6％。

Arkema has developed this kind of polyamide powders for their solvent and heat resistance as well as their hardness.

代表一个系列的超细聚酰胺粉末，它是由十二内酰胺和/或己内酰胺聚合而得到。

A SiC-AlN solid solution whisker with the polytype of 2H was firstly produced with the solid solution SiC powders at 1900℃ in the atmosphere of Ar.

并以此SiC固溶体粉为原料，在1900℃氩气环境下首次制备出了2H型SiC-AlN固溶体晶须。

Pont source spray purification system Co., Ltd is currently the potential for development than with the air filters and filter powders manufacturing enterprises, we have advanced automatic production lines and advanced testing equipment factory.

蓬源喷雾净化系统有限公司是目前国内较具有开发潜力的空气过滤器和粉体过滤器生产企业，我们拥有先进的全自动生产线和先进的出厂检测设备。

Potassium silver cyanide and potassium gold cyanide, which stability constants are very large, were used as the starting materials for the preparation of silver and gold powders. Adjusting the concentration ratio of protective agent to reducing agent and other reaction conditions can control the size, shape and morphology of precious metals nanoparticles.

使用氰化亚金钾和氰化银钾等稳定常数很大的金和银配合物作为制备纳米金粉和银粉的前驱体，控制保护剂／还原剂的比例以及其它反应条件，可以有效地控制粒子的大小、形状以及粒子聚集体的形貌。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐