杆

Looms that use rigid rapiers eliminate entirely the need to assist the rapier head through the warp shed.

织机在使用刚性剑杆时完全没有必要引导剑杆头穿越梭口。

Meanwhile, this text also discusses the possibility for the applications of this theory in the RC and SFRC pile cap s, and points out that the method of designing and calculating in the pile cap s which is systemic an.

同时，还探讨了拉压杆理论在钢筋混凝土和钢纤维混凝土桩承台中的应用的可能性，并指出应该建立系统化的基于拉压杆理论的桩承台设计计算方法。

Formulas to determine the reinforcement and bearing capacity of thick pile cap are selected on the basis of summarizing current design method. Thus, the design method of thick pile caps is put forward.

在总结现有方法的基础，选择出了厚承台的配筋与压杆承载力计算公式，由此得到了群桩基础厚承台拉压杆与梁组合体系设计方法。

In order to determine the size of coal pillar scientifically and reasonably, we mainly studied the law of stress distribution of the surrounding rock and the mechanism of narrow pillar drift and high strength bolt support and so on, indicating that using the narrow pillar drift and high strength bolt support can effectively guarantee the stability of gob-side entry in deep mine.

为科学合理地确定煤柱尺寸，保证沿空巷道的稳定，研究了沿空巷道的围岩应力分布规律、小煤柱护巷机理以及高强锚杆支护。从理论上证明了采用小煤柱护巷及高强锚杆支护方式理论上能够有效地保证深井沿空巷道的稳定。

The cut-off valve with pilot valve without hand wheel, stem and lift nut inside will guide block and guide slot Butterfly Valves to guide sleeve, the disc-shaped disc to disc type bowl shape, and holes in the bottom of the flap valve to open, the valve cover of the original valve stem hole to hole diversion, because of increased pressure ring, ring, and the valve flap to class mortar, so that the flow passage separated the upper chamber cavity, external cavity, cavity, in the cavity and The external cavity increases with draft tube and stainless steel manual ball valve, flap valve in the cover plate and the center of the end of installing the spring, the upper flap valve install compression seal of the pressure ring, outside the cavity of the wall to open a Drainage holes.

带先导球阀的截止阀无手轮、阀杆和内升降螺母，将导向块与导向槽改为导向套，将盘形阀瓣改为类钵体形阀瓣，并在底部开阀瓣孔，电动蝶阀将阀盖原阀杆孔改为导流孔，因增加压环、密封圈和将阀瓣改为类钵体，使上通流腔分隔为上腔、外腔、内腔，在上腔与外腔的外部加设有导流管与不锈钢手动球阀，在盖板与阀瓣底的中心部加设弹簧，阀瓣上部加设压紧密封圈的压环，在外腔的壁上开有放水孔。

For many years ,by adhering to the principle of customer foremost,Shanghai Saini Company has been always engaged in the production of R series coaxial hard gear surface column gear speed reducers, S series gear worm speed reducers, F series parallel axis gear speed reducers, K series spiral umbrella gear speed reducers, RV series worm speed reducers, MB, MBN planet taper disc stepless speed variators, WH/WB series high power gear speed reducers, cycloid pin gear speed reducers and other types of universal and special speed reducers.

多年以来，上海赛尼传动设备有限公司秉着客户至上的原则，专业生产WR系列同轴式硬齿面圆柱齿轮减速机，WK系列弧齿锥齿轮硬齿面减速机，WF系列平行轴斜齿轮减速机，WS系列圆柱蜗杆减速机，RV系列蜗杆减速机，MB、MBN行星锥盘无级变速机等其他类型通用的和专用的减速机，被广泛应用于舞台机械、食品、包装、陶瓷、制药、纺织、环保等诸多领域。

The diagram illustrates a stepped ejector pin manufactured from a solid rod.

图示的阶梯型顶杆用一根实心杆做成。

In the light of the successively occurred piercing and longitudinal cracking on the drill pipe box es,the fractures are analyzed by X-ray energy spectrum and electronic microscope,and the mechanical properties of the material are tested.

针对某油田一批进口钻杆连续发生17根钻杆内螺纹接头纵向开裂和刺穿事故，对断口进行X射线能谱、电镜和金相分析，并采样进行机械性能试验分析，认为材料不是导致接头断裂的主要原因。

Due to the increasing number of deep wells and directional wells being drilled,longitudinal fracture occurred on the box-ended drill pipe tool joint is often reported.

对钻杆接头材料进行SSC试验，发现如果将材料硬度限制在HB310以内，将明显减少钻杆内螺纹接头纵向应力腐蚀开裂失效。

With regard to the question how to cut the helical camber of screw-pump and spiral rod drilling tool in the field of petroleum machine and chemical machine, this paper firstly puts forward the cutting method how to apply the milling with non-instantaneous-pole envelope principle with plate milling cutter in our country.

本论文针对石油、化工机械领域螺杆泵、螺杆钻具转子的螺旋曲面切削加工问题，在国内首次提出了应用盘铣刀的无瞬心包络铣削加工方法。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。