This relates to a moving disc in contact with a stationary one.

它针对的情况是一个运动的圆盘与另一个静止的圆盘相接触。

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Disc has a differential Angle front the seat to provide a line contact for maximum sealing.

这类阀瓣具有不同的角度面对阀座，因此具有线接触作用，从而实现最大限度的密封。

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The disc assembly maintains contact with the guides through the full valve stroke.

这个阀瓣总成在阀门全行程中保持与导向装置的接触。

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It will then self-destruct not in flames, its inventors hasten to add, but because contact with the air eventually renders its surface opaque, making it impossible for the laser in a disc player to read the data beneath.

ECONOMIST: A new twist on an old polymer