孔

Through the characteristic experiment to five PVC filmducts with different hole spacing,a series of design parameter was recom-mended under the allowable error(±10%)of hole discharge air volume per u-nit lengh.

通过在鸡舍环境下对五组不同孔口分布的带孔PVC风管的送风均匀性试验，推荐了在孔口气流一致性偏差允许范围内(±10％)带孔PVC风管的工程设计参数。

Elaborated the punching components formation principle, the basic dies structure and the rate process and the principle of design; and designed some conventional punching die:the die for big diameter three direction pipe which solved the problom of traditional machining,the drawing and punching compound die with float punch-matrix,代写医学论文,the drawing and cutting compound dies with unaltered press,the compound die for the back bowl of the noise keeper,the design of the compound die which could produce two workpieces in one punching,the bending die for the ring shape part ,the bending die which used the gemel ,automate loading die for cutting, the drawing,punching and burring compound dies with sliding automated loading,the punching die for the long pipe with two row of hole,the drawing die for the square box shape workpiece and the burring die for the box shape workpiece.

本文对于冷冲压技术的分类、特点及成长方向作了简略概说；论述了冲压零件的形成原理、基本模具结构与运动过程及其预设原理；对于典型的冲压件模具进行了预设：大直径三通管冲压复合模预设盖世了大直径三通管的加工难题、带有浮动凸凹模的拉伸冲孔复合模预设、适力压边式落料拉伸切边复合模预设、消音器后补碗落料、拉深、冲孔、翻边复合模预设、一模两件落料拉伸冲孔翻边复合模预设、圆环弯曲件的模具预设、铰链卷圆成形工艺及模具预设、半自动送料切角装置预设、滑板式送料拉深、冲孔、翻边模预设实现自动送料、长管多孔冲模预设、带凸缘台阶方盒形零件拉深模和盒形件侧壁小孔翻孔模。

Elaborated the punching components formation principle, the basic dies structure and the rate process and the principle of design; and designed some conventional punching die:the die for big diameter three direction pipe which solved the problom of traditional machining,the drawing and punching compound die with float punch-matrix,the drawing and cutting compound dies with unaltered press,the compound die for the back bowl of the noise keeper,the design of the compound die which could produce two workpieces in one punching,the bending die for the ring shape part ,the bending die which used the gemel ,automate loading die for cutting, the drawing,punching and burring compound dies with sliding automated loading,the punching die for the long pipe with two row of hole,the drawing die for the square box shape workpiece and the burring die for the box shape workpiece.

论述了冲压零件的形成原理、基本模具结构与运动过程及其设计原理；对典型的冲压件模具进行了设计：大直径三通管冲压复合模设计解决了大直径三通管的加工难题、带有浮动凸凹模的拉伸冲孔复合模设计、适力压边式落料拉伸切边复合模设计、消音器后补碗落料、拉深、冲孔、翻边复合模设计、一模两件落料拉伸冲孔翻边复合模设计、环形弯曲件的模具设计、铰链卷圆成形工艺及模具设计、半自动送料切角装置设计、滑板式送料拉深、冲孔、翻边模设计实现自动送料、长管多孔冲模设计、带凸缘台阶方盒形零件拉深模和盒形件侧壁小孔翻孔模。

Elaborated the punching components formation principle the basic dies structure and the rate process and the principle of design; and designed some conventional punching die:the die for big diameter three direction pipe which solved the problom of traditional machiningthe drawing and punching compound die with float punch-matrixthe drawing and cutting compound dies with unaltered pressthe compound die for the back bowl of the noise keeperthe design of the compound die which could produce two workpieces in one punchingthe bending die for the ring shape part the bending die which used the gemel automate loading die for cutting the drawingpunching and burring compound dies with sliding automated loadingthe punching die for the long pipe with two row of holethe drawing die for the square box shape workpiece and the burring die for the box shape workpiece.

本文对冷冲压技术的分类、特点及发展方向作了简略概述；论述了冲压零件的形成原理、基本模具结构与运动过程及其设计原理；对典型的冲压件模具进行了设计：大直径三通管冲压复合模设计解决了大直径三通管的加工难题、带有浮动凸凹模的拉伸冲孔复合模设计、适力压边式落料拉伸切边复合模设计、消音器后补碗落料、拉深、冲孔、翻边复合模设计、一模两件落料拉伸冲孔翻边复合模设计、环形弯曲件的模具设计、铰链卷圆成形工艺及模具设计、半自动送料切角装置设计、滑板式送料拉深、冲孔、翻边模设计实现自动送料、长管多孔冲模设计、带凸缘台阶方盒形零件拉深模和盒形件侧壁小孔翻孔模。

To die together with the release铁盖burning furnace used in hot, brush with oil dip coated mold hole again, check铜壶will be followed by injection mold slurry surface hole (only half-filling holes), will die immediately give onwards, slowly turning to face sticky paste evenly in the hole wall, and then on the furnace will be inserted into holes in the bamboo pulp surface scraping the walls of the hole.

把模具连同铁盖放炉上用中火烧烫，用刷子蘸水油将模具孔涂抹一遍，取铜壶将面浆依次注入模孔，随即将模具举起，缓缓转动，使面浆均匀黏在孔壁，然后放在炉上，将竹片插入孔中把面浆刮向孔的四壁。

Thermal performance of the slotted light steel-framed composite wall is simulated in this paper.The influence of perforated parameters to heat transfer is studied.

对C型腹板开孔轻钢龙骨复合墙体的传热性能进行了数值模拟，分析了腹板开孔参数(开孔排数、开孔长度、宽度、孔的横向间距和纵向间距)对墙体传热的影响和热桥问题。

In the present dissertation, a surfactant-templated mesoporous silica molecular sieve with high pore volume, high porosity and narrow bimodal mesopore size distribution was synthesized for the first time in a reaction system, which was used usually in the synthesis of mesoporous MCM-41 molecular sieves, by a judiciously controlled two-phase sol-gel processing under basic conditions.

在本论文中，我们通过对一个通常用于制备介孔MCM-41分子筛的反应体系中正硅酸乙酯水解与缩合反应相对速率的精确调控，首次在弱碱性体系中合成了一种具有高孔隙率、大孔体积和双介孔孔分布特征的新型二氧化硅分子筛材料，简记为BMS，并对BMS二氧化硅分子筛中双介孔结构形成的原因及各种可能对其结构和性质产生影响的合成因素如Ammonia／silica摩尔比、组分浓度的变化、表面活性剂烷基链长度的调节、辅助有机物均三甲苯的引入、催化剂的结构和性质、溶剂和助溶剂的极性和用量、老化和干燥条件的变化及合成后水热处理等，利用不同的测试手段如XRD，SEM，TEM，〓Si MAS NMR，TG-DTA，N〓吸附测试等进行了系统的表征研究。

An isolating plate matching with the rotor in sliding way is arranged in the shell. An isolating plate sliding hole is opened on the shell wall between the closer inlet hole and the outlet hole. A sealing member is arranged in the isolating plate sliding hole.

其特征是在带有中心轴孔和进、出孔的壳体内通过中心轴设有侧面呈斜面的圆形转子，并设有与转子滑配的隔板，在两个相近的进、出孔间的壳壁上开有隔板滑孔，在隔板滑孔内设有密封件。

His field investigation resulted in his policies of uniting and pacifying the ethnic groups, which successfully stabilized the frontier and enriched the local people. He encouraged rice planting at the reservoir area and taught mountainous residents to plant tea, a local specialty. At that time, China's tea trade started to bud and Zhuge Liang's policy laid the cornerstone for the forming of the Pu'er tea planting area in Yunnan, that gave birth to many historically famous tea varieties and events, including the Nanzhong Tea in the Jin Dynasty, the Yinsheng Tea in the Tang Dynasty, the tea-horse barter in the Song Dynasty, the Gong Tea in the Ming Dynasty, and the worldfamous Pu'er Tea in the Qing Dynasty.

他在坝区发展水稻生产，在山区教民利用当地茶树资源种植茶叶，时值中国茶叶商业萌芽时期，此举为后世云南普洱茶区的形成，奠下了开山基石，此后才相继出现晋朝的&南中茶子&、唐代&茶出银生&、宋代茶马交易、明代贡茶和&名重天下&的清代普洱茶，衣食万户，造福人民，深得人民拥戴，多种历史文献记载，古六大茶山均以孔明遗物命名，革登山的茶王树为&武侯遗种&，茶区人民称茶山为孔明山、茶树为孔明树，建房仿孔明帽，尊孔明为茶祖、阿祖、阿公，开茶祖会，放孔明灯，感恩祭祀，世代相传。

Themapping function sequences including circular cutouts and elliptical cutouts aregiven in this chapter.

然后为方便地满足圆柱壳大开孔的边界条件，通过复变函数方法中的用来求解多边形映射问题的Schwarz-Christoffel积分表达式，将圆柱壳展开面上的非圆非椭的开孔边界曲线保角映射成为单位圆，给出了在不同开孔率情况下的关于圆孔和椭圆孔的保角映射函数的具体形式。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失