The results show that the cracks on the sealing labyrinth are heat-fatigue cracked resulted by the temperature field around the third tooth of the sealing labyrinth.

结果表明，封严篦齿上的裂纹为热疲劳裂纹，裂纹的形成主要与第三封严篦齿附近的温度场有关。

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YCB arc gear pumps are mainly gear, KCG axis, the pump body, cover, the axial bearing, sealing etc. Using double circular-arc gear tooth sine curve.

主要有齿轮、轴、泵体、泵盖、轴承套、轴端密封等组成。齿轮采用双圆弧正弦曲线齿形制造。

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This paper analyses theoretically and technologically, the reason of barrel tooth holders sealing off , of produced gas hole and cold crack.

从理论和工艺上分析滚筒齿座开焊的原因、气孔的产生和怎样减少气孔生成、冷裂现象生成及其予防。

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As the bacteria responsible for the tooth decay are sealed in, and deprived of nutrients, the act of sealing the decaying tooth with the metal cap should prevent the decay from spreading, at least until the baby tooth is shed at around 10 years of age.

BBC: Children could be spared dentists' drill