空心

The plasma arc generator comprises cathode, two anodes and insulating strip between two anodes, first anode is cylindrical hollow sleeve, the cylinder cathode is placed in the centre of said sleeve, and an annular fluid channel is formed between both the lower portion of first anode is equipped with a hole as fluid outlet, and second anode is a circular plate with central hole, between two anodes there is an insulating strip, the diameter of central hole of second anode is less than the diameter of lower hole of first anode.

本发明是一种串式多级压缩等离子弧发生器，由阴极、两阳极及阳极之间的绝缘片组成，第一阳极为圆柱形空心套管，圆柱体阴极处于该套管中心，并在两者之间形成环状流体通道，第一阳极下部是一个供流体出口的横截面为圆的孔，第二阳极是中心开孔的圆形板，两阳极之间有绝缘片，第二阳极中心孔的直径小于第一阳极下部孔的直径。

The author made induction and arrangement and offer to the two sides of the Taiwan Straits civil engineering scientific and technical workers, in order to obtain "break the ice","adopt sb.'s strong points while overcoming one's weak points", prosperous both banks economic development, promote the common progress of science and technology from the "open-web truss structure" at the 80 middle decade last century, and "open-web sandwich plate structure" at the 90 middle decade last century, and "cast-in-place concrete hollow plate structures" at the beginning of the century, to "the reinforced concrete open-web sandwich reticulated barrel arch structures" recently.

从上世纪80年代中期开发的&空腹网架结构&、上世纪90年代中期的&空腹夹层板结构&到本世纪初期的&现浇混凝土圆孔空心楼盖结构&和近期（2006年）开发应用的&钢筋混凝土空腹夹层曲面网壳与筒拱结构&，进行归纳整理，奉献给海峡两岸土木工程科技工作者，以求&抛砖引玉&、&取长补短&，繁荣两岸经济建设，促进两岸科学技术共同进步。

The structure brief introduction the dense thick liquid pump of one stud of i-1b s series is formed by four parts electromotor , shaft coupling , pump and bases motive force joining in marriage usefulness uses y s series asynchronous electromotor of three-phase the shaft coupling uses the water pump with the paw mould elasticity shaft coupling the pump by the pump shell , become hollow inside axle and universal twists joints and winds axle , stud , bush and axle seal and package places and goes out the material mouth etc and forms , and the section of stud is the oval for round and bush section , and his interior surface is the duplexing spirals faces .

结构简介 i-1b系列单螺杆浓浆泵由电动机、联轴器、泵和底座四个部分组成。配用的动力采用y系列三相异步电动机。联轴器采用水泵用爪型弹性联轴器。泵由泵壳、空心轴、万向绞接头、绕轴、螺杆、衬套、轴封装置和出料口等组成，螺杆的断面为圆形、衬套断面为椭圆形，其内表面为双螺旋面。

Finally, the index of non-probabilistic reliability is introduced in mathematic model of optimization design, and optimizations of axle shaft structure of machine tool and hollow conveying shaft based on non-probabilistic reliability model are presented. The engineering examples show that the presented methods are convenient and effective.

最后，将机械的非概率可靠性指标引入到优化设计的数学模型中，分别对空心传动轴和机床主轴结构进行了可靠性优化设计，通过工程实例说明了该方法是简便和有效的。

The plastic limit analysis and parametric design of a hollow cast steel roll with axle sleeve of the high-speed paper machine are studied.

研究了高速纸机中具有闷头的空心铸钢辊结构的塑性极限和参数设计问题。

Based on the theory of elasticity, the variations of lower limit and upper limit of the interference value of a hollow iron roll with the axle sleeve were determined as a function of paper machine speed.

应用弹性理论导出了纸机中具有闷头的空心铸铁辊结构的过盈量上下限相对变化与车速的关系式，提出了极限车速的概念与计算方法，从而为过盈量的动态估算提供了量化依据。

A bar of iron is solid; a pipe is hollow.

铁棍是实心的，而管子是空心的。

A bar of iron is solid; a pipe is hollow.

铁棍是实心的，铁棍是实心的，而管子是空心的。

A iron bar is solid, a pipe is hollow.

铁条是实心的，管子是空心的。

Small hollow in a white exposed tendons, which should be learned is the nutrition bar line.

细小空心的果蒂中露出一根白白的筋，这应当就是吸取营养的管路吧。

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