中杆

This valve is widely used in the pipe system transporting coal gas, natural gas, venting and environment protection in building material, glass, mining, power, light industry and papermaking departments. The technique is introduced from foreign Company.

手动翻板式三杆蝶阀引进国外先进技术，广泛适用于建材、玻璃、矿山、电力、轻工、造纸等行业的能源输送管道的煤气、天然气、通风、环保工程等管道系统中。

This valve is widely used in the pipe system transporting coal gas, natural gas, venting and environment protection in building material, glass, mining, power, light industry and papermaking departments. The technique is introduced from foreign Company.

电动翻板式三杆蝶阀引进国外先进技术，广泛适用于建材、玻璃、矿山、电力、轻工、造纸等行业的能源输送管道的煤气、天然气、通风、环保工程等管道系统中。

The vertical load on the underpinning-node resisted by shear capacity of bolt, new-old concrete interface and profiled bar fringe embedded in column. A formula calculating bearing capacity of the underpinning was advised, and the combined work was calculated by cooperate coefficient γ.

分析认为托换节点的竖向荷载由螺杆的抗剪承载力、新旧混凝土连接界面的抗剪能力和型钢翼缘卡入柱身产生的咬合力共同承担，由此给出了型钢对拉螺栓柱托换节点的抗剪承载力计算公式，式中通过综合作用系数γ考虑了3部分的共同作用和相互影响。

The 4th Qiantangjiang River Bridge in Hangzhou is a concrete-filled steel tubular composite tied arch bridge with double decks and double main arches.

钱江四桥为双层桥面双主拱钢管混凝土组合系杆拱桥，主桥共有11跨，包括了下承、中承、上承三种拱桥形式。

The changes of rat cone response during the light adaptation may reflect the summary effects of rods, cones and more neuromodulatary cells.

明适应过程中，视锥反应的发展变化反映了视锥、视杆细胞及更高水平神经调制细胞的综合作用。

Based on copper plastic processing features, the metal rolling theory and the practical procedure, the paper presents the design method of the copper bar rolling mill pass system and the calculation methods of the factors. Some key factors, such as the elongation factor and filling metal degree through the pass system at every rolling segment, and some dynamic factors are calculated for small and middle copper bar rolling mills.

根据铜加工塑性加工特性及金属连轧理论，结合生产过程，文章提出了中小直径铜杆连轧机整个孔型系统设计方法和参数计算方法，计算了各轧制道次延伸系数、各道次孔型金属充满度等关键参数，并对连轧机中的动态参数进行了计算。

The results show that new residual stress is about 6MPa under air-cooled normalizing; due to chilling effect of surface quenching, the temperature differences between coarse bar and thin bar in stress frame, and between surface and core of the coarse bar are tremendous; in quenching process, the stress of the certain areas in the coarse bar is maximum at 2s, more than 420MPa, the stress frame casting has the bigger possibilities of fracture.

结果表明，正火空冷时新产生的残余热应力约6MPa；淬火时由于表面激冷作用，应力框在粗细杆间及粗杆的表面和芯部都有巨大温差；铸件在淬火的过程中，粗杆的某些部位在2s时等效应力达到最大，超过了420MPa，极有可能导致铸件断裂。

Based on the column deflection curve method,the paper analyzed the effect of semi-rigid connection to the effective length of compressed web members in the cold-formed thin-walled steel truss.

本文通过柱挠度曲线法，分析了连接半刚性对冷弯薄壁型钢桁架中受压腹杆计算长度的影响。

Via the sample of erecting a steel girder bridge of 62.8 m span by float tow , the article summarizes the main technique point of the method of assembling tow boat, the process of float dragging beam, the setting up scaffold, disposal of tow and stepping equipment , calculation of float dragging stability, the fastening of hang up pole E3A3 etc, also make suggestion on the dragging equipment selection, the selection of float dragging support point and so on.

通过对跨度为62 8m钢桁梁浮拖架设的尝试，对浮拖架设中的浮拖船结构和组装、浮拖法施工步骤、膺架搭设、牵引和走行设备布置、浮拖稳定性检算、挂杆E3A3加固等主要技术环节进行了总结，并对牵引设备的选用、浮拖支承点位置选择等有关方面提出建议。

Based on the theory study, a directional drilling guidance system is developed for practical require, its working flow as follows: before construction, design the best track practically, and save in the system. During drilling, the system measures well oblique angle and azimuth to watch well track. Drill driver compares designing well track with measuring track showing on display unit, controls joy stick experientially, adjusts drill direction, finally realizes directional drill.

在理论研究的基础上，结合实际需要，研究设计了一种定向钻井导航系统，使用该系统进行定向穿越施工的工作过程如下：在施工前，根据实际情况，先设计一条最佳穿越路线，存入系统；在钻进中，系统通过对井轨的井斜、方位等参数的测量，对其进行实时监测；地面的司钻手通过对显示仪所显示的实际井轨参数及设计井轨参数进行比较，根据经验操纵操作杆，调整钻机前进方向，以达到对钻进过程的控制，最终实现定向钻井。

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