W - cu composites prepared from the precipitation w - cu powder have higher sintered density , better mechanical and physical property , more homogeneous and finer microstructure than those prepared from w - cu powder by the balling - reduction method . in chapter 5 , a combination of homogeneous precipitation and ball - milling process , namely the mechano - thermochemical process was employed to prepare ultra - fine w - cu powder 其中，球磨w一cu复合粉( hp一m )压坯在1150下烧结30min后，可获得相对密度大于99 %的几乎全致密的超细晶粒w一cu复合材料， w的颗粒度小于0 . 5林m 。
Although sdh transmission is being widely applied in the core network , its tdm - based nature implies some weaknesses , such as large bandwidth granularity and inflexible bandwidth allocation , making it not suited to the access network where users are in great number and bandwidth demand is unpredictable . so the application of sdh in the access network is somewhat limited 虽然sdh传输技术正在广泛地应用于核心级网络中，但是因为它采用时分复用的机制，具有带宽的颗粒度太大，带宽分配不灵活，不适合于接入网中用户数量多、带宽需求不确定等特点，所以sdh技术在接入网中的应用受到一定的限制。
The flyweight pattern employs a factory method to dispense references to immutable fine - grained objects and uses sharing to keep the object count down by only having a single instance of the object corresponding to the letter " a . " for more information on the flyweight pattern , see the classic book , Flyweight模式采用工厂方法来分配对不变的细颗粒度对象的引用，并通过仅使一个对象实例与字母“ a ”对应来利用共享缩减对象数。有关flyweight模式的更多信息，请参阅经典书籍
Zfl serial automatic back flush device is used in the clean water and sewage disposal of the power plant , water works , and factory mainly , can realize not shutting down and run in succession in large flow , is especially suitable for a lot of water quality of one degree of big , filth of particle , the products use the stainless steel material , guarantee the water quality after filtering will not produce the secondary pollution Zfl系列自动反冲洗装置zfl系列自动反冲洗装置主要用于电厂水厂及工厂的洁净水和污水处理，能够实现不停机大流量连续运行，特别适用于颗粒度大污物多的水质，产品使用不锈钢材质，保证过滤后的水质不会产生二次污染。
In this dissertation , the author summed up the muti - technique in fluid dynamics , heat and mass transferring , mechanical designing and computational technique and studied the conventional pressure spray dryers with different air disperse structure and outlet equipment , at last put forward the theme i . e . the study on combined spin - flow pressure spray drying technology , the main contents were as follows : ( 1 ) the combined spin - flow pressure nozzle was designed whose novel structure has no report at present , and the structural designing parameters were obtained through analyzing the physical characteristic of materials and distribution of particles 本文总结了国内外在压力喷雾干燥装置的研究应用状况，并分析了现有喷雾干燥装置设计方面的优缺点，运用流体力学、空气动力学、传热传质学、机械设计和计算机技术等多学科知识，综合研究了传统压力喷雾干燥系统的单喷嘴雾化装置在并流、逆流以及混流干燥中的应用和喷雾干燥塔的不同布风装置以及出风装置的设置情况等，提出了新型旋流式组合压力喷雾干燥技术并对此进行了研究，其主要内容包括： ( 1 )本文创造性地设计出旋流式组合压力喷嘴的基本结构，并通过对料液的物化特性研究分析以及颗粒度的分布要求，给出了喷嘴的不同结构设计参数。
The experimental results indicated that the tea waste powder as an additive to uf resin could reduce its free formaldehyde content and reduce the formaldehyde emission of uf resin bonded plywood ; the tea waste powder with much less size was easily mixed with uf resin and acted much more effective ; the tea waste as an additive to uf resin in a proper amount did nut decrease the bond strength of plywood 实验结果表明，茶叶废料作为填料添加到脲醛树脂胶黏剂中，能够降低其游离甲醛含量以及其黏接胶合板的甲醛释放量；茶叶废料颗粒度越小，与脲醛树脂混合性越好，消除甲醛效果越显著；茶叶废料的适量加入不会降低胶合板胶合强度。
