双层平板型斜放四角锥网架节点构造简单，受力合理，用钢量是四角锥体系网架中最小的一种形式，也是国内工程中应用较多的一种。
Double layer flat diagonal square pyramid grids has the advantages of being simple in formation, rational in member stressing and fairly economic of steel cost among square pyramid grids system.
分析了牙轮钻头安装和磨损间隙引起牙轮相对牙爪轴线的平移和倾斜对相邻锥体上球齿间隙的影响，通过计算，当牙轮、牙爪轴线轴向、径向平移使球齿的趋近量有抵消的趋势；
The paper analyses the effect of translation and offset angle of the cone axis to shaft one on the gap variation between two ring-button, which position on two cones.
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