用螺旋测微器测量水准仪平移的距离，从而得到钢丝长度的微小变化值。

The small variation of the steel-wire's length can be obtained by measuring the displacement of leveling bench with micrometer.

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但后来我们开始在环太平洋沿岸设立海平面水准仪(现在几乎所有的码头和海港都设有一到两台这样的设备)，它们通常被绑在桥墩上，可以测量海面的高度。

But then later on we started installing sea level gauges all around the Pacific Ocean. Pretty much every port and harbor in the world has one or two of these.

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投入人员近20人次，投入GPS接收机、水准仪、全站仪、平板仪测量仪器10多台套。

Investment officer for nearly 20 million, put GPS receivers, water level, total station, flat instrument more than 10 sets of measuring instruments.

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