The "EPG" (two jaw) and "ETG" (three jaw) parallel gripper lines utilize a double acting piston and rocker arm design.
在“电子节目指南”（两个下巴）和“ETG的”（三下巴）爪平行线利用了双动活塞和摇臂的设计。
The pictures of the double-circle target fixed on a jaw rudder surface and parallel to its axis were taken by a stationary digital camera.
用一台位置固定的数码相机对平行于飞机方向舵转轴并固定在该舵面上的一个双圆靶拍照。
The pictures of the double-circle target fixed on a jaw rudder surface and parallel to its axis were taken by a stationary digital camera.
用一台位置固定的数码相机对平行于飞机方向舵转轴并固定在该舵面上的一个双圆靶拍照。
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