对于火炮这样一些设备，则采用机械式刻度盘及光学分划装置加以测量。

For some equipment like artillery, it USES mechanical dials and optical division equipment to measure.

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在发动机的批生产过程中均需准确、快速地对发动机质心位置加以测量。

When the SRMs are designed, tested and finalized, we need measure it accurately and fast.

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例如，时间，虽然能用钟表加以测量，也是相对的，因为有不止一种时间体系可以来表示时间。

For example, time, which is measured with clocks andwatches, is relative because it can be shown that there is more than one system of time.

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