This filter USES several parallel-coupling ring resonators and direct-coupling structure between feed lines and rings.
该滤波器采用数个环形谐振器平行耦合，而输入输出馈线与环形谐振器之间采用直接耦合。
The speed reducer upper on the main machine makes central axis rotate through shaft coupling and roller hanger rotates with central axis and rollers on the hanger roll around the inside of ring.
安装在主机顶部的减速机，通过联轴器连接中心轴旋转，中心轴带动磨辊吊架旋转，磨辊装在吊架上沿磨环内周一起滚动。
The coupling reinforced with a elastic ring is a new type of spring coupling.
弹性环骨架联轴器是一种新型弹性联轴器。
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