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1·The calculations of coupling slots between the curved waveguide and the fan shaped straight waveguides are emphasized.

重点是弯波导与扇面形在波导列之间的耦合孔列计算。

2·Drum gear coupling due to the compensation Angle is greater than straight-tooth coupling.

由于鼓形齿式联轴器角向补偿大于直齿式联轴器。

3·The new Technology of Straight Threaded Coupling have been adopted in the Prestressed Resist draw Bored cast-in-place Pile of the Pile Foundation of Fujian Theatre.

福建大剧院桩基工程预应力抗拔钻孔灌注桩钢筋笼采用直螺纹连接新技术。

4·The pipe quick coupling port structure has the advantages of high installation efficiency and high sealability in the coupling of such special pipes as straight pipes, bent pipes, T-joints and so on.

在直插管道与弯管、三通等异形管件的相互联接中，具有安装效率高、密封性能好的优点。