Wide comfortable seating surface.

座椅表面舒适。

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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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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。

youdao