Sales of surveying and mapping equipment from conventional optical theodolite, Level electronic Total Station, GPS and software.
销售的测绘仪器从常规的光学经纬仪、水准仪到电子全站仪、GPS及其软件等。
And the error ranges of the measurements with theodolite and level are evaluated.
并估算了水准仪、经纬仪测滩结果的误差范围。
And the error ranges of the measurements with theodolite and level are evaluated.
并估算了水准仪、经纬仪测滩结果的误差范围。
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