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" blocking"of three way switching valve.
三通切换阀“卡死”。
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The aortic valve shows three thin and delicate cusps.
主动脉瓣是三个薄而灵活的瓣膜。
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Three sea anemones sitting on the aortic valve.
三海葵在主动脉瓣。
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Three-way valve: born in the 1950s.
三通阀：诞生于50年代。
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Three-way valve: born in the 1950s.
三通阀：诞生于50年代。
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