Tilting disc Check Valves consist of a cylindrical housing, with a pivoted circular disc.

翻转式阀瓣止回阀由圆柱形外壳及转动圆盘阀瓣构成。

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In this paper, we point out that there exists a logic problem to calculate the area of circular disc in many textbooks of calculus.

本文中我们首先指出在现行很多“析”和“高等数学”教材中出现的计算圆的面积存在逻辑循环的问题。

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The multiple reflection within the circular disc provides a design feature to reduce the influence of non-total internal reflection and significantly improves the measurement linearity.

光线在圆盘内的多次反射显著地消除了非全内反射的影响，有效地改善了测量线性度。

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The circular disc of blue limestone has been set into the pavement outside Bath Abbey.

BBC: Cotswold Way marker to be unveiled in Bath