key

In this paper combined with actual works the design and construction method are introduced that applying pouring joist with pin key one existing brick wall to form a wall beam with upper masonry enhances the wall s load after cutting a big hole in it.

结合工程实例 ,介绍了在已有砖墙上浇筑带销键的托梁 ,与上部砌体形成墙梁来承托开凿宽大窗洞后的洞顶墙体荷载的设计、施工方法 ,指出该方法取得了良好的应用效果 ,既加快了施工进度 ,又降低了造价。

Research and design on a new type snap pin;

一种新型快捷销的设计研究

Rotary forging of pin parts used in rail cars and development of new rotary forging press;

铁路车辆销类件摆辗精密成形及新型摆辗机研制

A New Calculation Method for Steady - state Temperature between a Stationary Pin and a Rotating Disc;

静止销和旋转圆盘间的稳态温度新算法

The problems existing in large shear clamp for shear test of pins are analyzed in detail in this paper,and practical improvement method is given.

对现有的剪断销剪切试验用重型单剪装置存在的问题进行了系统分析,提出了对该重型单剪装置结构优化的具体方案和实施办法。