A double flexible metallic O-Ring seat provides a (1) static and (2) dynamic seal and assures compliance to fire-safe specifications.

双重柔性金属O形环阀座具有静止和动态密封性能，确保符合防火规则要求。

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If the pilot had to pull the "d" ring (ejection handle) in an emergency, the cables would snap the wearer's feet back under the seat to ensure a smooth and safe ejection from the aircraft.

当发生紧急情况，飞行员需要弹射时，缆绳会将马刺佩戴者的足部从座椅下方拉出来，以确保弹射安全。

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Disc– machined seating surface is mated to seat ring for positive shutoff.

阀瓣-机加工阀座表面，配置阀座环，实现积极有效的关闭。

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It's one of the privileges of being a journalist: a ring-side seat for the memorable, bizarre or one-off event.

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He had a ring-side seat, in other words, while his lover wasted away.

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And if he's sitting on the seat of his pants in the middle of the ring, there's not much they can shout.

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