The results show that the VMA value computed by percent air voids in bituminous mixture plus percent total bitumen volume in bituminous mixtures is bigger than the VMA value by America method.

研究表明：我国的计算方法之一，用空隙率与总沥青用量的和计算的VMA明显偏大，有时难以排除不满足最小VMA要求的混合料。

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The apparatus of drop volume method was made in this paper, accuracy of which was verified according to the literature value.

采用自制的滴体积法实验装置，以蒸馏水的表面张力作为标准，检验了其精确性。

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Objective: to establish the measurement method of the normal orbital and optic canal by ct scanned, and to explore the clinical value of the orbital volume and its regressive equation.

目的：建立正常人眼眶及视神经管骨性径线ct测量的方法，探讨CT测量眼眶容积及其回归方程的临床意义。

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