相比较远程有人驾驶飞机，新型无人机的出现代表了一次重大飞跃，成为911恐怖袭击之后美国反恐行动的典型武器。
The new drones represent a big advance in the remotely piloted planes, which have been the signature US weapon against terrorist groups since the September 11 attacks.
本实用新型使瓶盖和拉环一次成型，成为整齐划一的易拉瓶盖。
The utility model can complete one-time forming of the bottle cap and the pull-tab, which can form a uniform easy-to-draw bottle cap.
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