铰

Point-to-point systems are suitable for hole-machining operations such as drilling, countersinking, counterboring, ream ing,boring, and tapping.

点位系统适用于钻孔、锪孔、扩孔、铰孔、镗孔、攻丝等孔加工。

Standard grade for turning, drilling, milling, reaming, countersinking of hardened steels, white and grey cast iron light metals, plastics and synthetic materials, Al-Si-Mn-Cu-alloys, glass, ceramics, graphite.

对硬钢、白铸铁、灰铸铁、轻金属、塑料、合成材料、铝-硅-锰-铜合金、玻璃、陶器、石墨等进行车削、钻孔、铣削、铰孔、穿孔等加工的标准牌号。

RKF Standard grade for turning, drilling, milling, reaming, countersinking of hardened steels, white and grey cast iron light metals, plastics and synthetic materials, Al-Si-Mn-Cu-alloys, glass, ceramics, graphite.

对硬钢、白铸铁、灰铸铁、轻金属、塑料、合成材料、铝-硅-锰-铜合金、玻璃、陶器、石墨等进行车削、钻孔、铣削、铰孔、穿孔等加工的标准牌号。

Unceasingly enhances along withthe modernization machine-finishing request, the people more and moremany uses compound cutting tool substitutes for the former multi-steps processing, in order to enhance the processing efficiency,clamps to the complex components processing request in an attirecarries on the multi- working procedures the centralism processing,and gradually desalinates traditional the mill, drills, thearticulation, expands and so on the different cutting craft theboundary, is the current enhancement processing efficiency mostlimited way.

随着现代化机械加工的要求不断提高，人们越来越多的采用复合刀具来取代以往的多步骤加工，为了提高加工效率，对复杂零件的加工要求在一次装夹中进行多工序的集中加工，并逐渐淡化传统的铣、钻、铰、扩等不同切削工艺的界限，是当前提高加工效率的最有限途径。

Those with helical flutes provide smooth shear cutting are less subject to chatter, and produce a better finish.

那些带有提供光滑的剪切式切断的螺旋槽的铰刀很少受到振动，因此产生较好的光洁度。

And destruction usually occurs on angle.(2)Around the keyhole, the stress centralizes, column" edge opt to inflects in local.(3)The change of friction coefficients or bolt pretension forces can"t affect the performance of top-and-seat angel connections so much.(4)The parameters of angel influence joints performance greatly.

破坏一般是由于顶角钢上应力过大，形成塑性铰而导致的；(2)柱翼缘在与顶角钢相连的螺栓孔周围，存在应力集中，容易导致局部屈曲；(3)材料抗滑移系数的改变和螺栓预拉力的大小对于节点受力性能的影响并不明显；(4)角钢参数的改变对节点的各项性能影响显著，增加角钢厚度，节点的强度、刚度和延性都能得到明显的提高；增加角钢长度，节点的强度和刚度也有较大的提高，延性则略有下降；(5)柱轴压比过大时，节点的承载力、刚度以及变形能力明显下降；(6)螺栓中心线到角钢肢背距离增大时，节点的强度和刚度有所下降，但延性略有增加。

Example two analyzes the static construction character steel frame, braced frame and different braced frame, including relation of loading-level displacement, inter梥tory displacement and distribution of plastic hinge, the frames ductility, the axis force of brace and shearing-force of ground brace bearing, then it is clearly known the brace can minis the level displacement of frame, minis inter-story displacement, bear ground floor shearing-force. So, the brace greatly inflects construction performance of braced frame .

算例二对纯框架和支撑框架以及支撑框架不同支撑情况下进行非线性弹塑性分析：包括荷载—水平位移关系，层间相对位移与塑性铰分布，刚架延性，支撑轴力及底层支撑承担剪力等情况，了解到支撑可以减小框架柱顶水平位移，减小层间相对位移，增加刚架延性、承担底层剪力，显示支撑对框架结构性能的重要影响。

Hence the risk of operation accidents of articulated vehicles such as rolling-over and jackknifing can be reduced.

采用该系统还可以减少铰接车辆行驶中某些事故的发生。

Before installing, be sure pipe ends are reamed and threads are cut to size.

在安装之前，要确保管道连接端已经经过铰孔，螺纹有足够的长度。

Before installing the valve, be sure that the pipe ends are reamed and threads are cut to size.

在安装阀门之前，要确保管道末端经过铰孔，螺纹长度切割适中。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。