采用声学方法精密测定汞被高压强压入储油岩样的渗入体积，对岩芯孔隙结构测定中的汞体积计量方法作了重要改进。

The paper presents an acoustical method to precisely measure the permeating volume of mercury forced into an oil bearing rock sample under high pressure.

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为找出原因，研究人员用精密X射线分析仪测定了变成褐色颜料的精确化学成分。

To find out why, researchers used sophisticated X-ray analyses to determine the exact chemical composition of the paint as it browns.

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借助传感器测定和单片机控制步进电机的精密驱动系统，使得自动搬运车能在狭小的仓库过道中灵活行进。

With the help of precise driving system of sensor measuring and single chip micro-computer controlled step motor, enabled the cart to move flexibly in narrow aisles of the storehouse.

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