在传统的超高压输电线路设计选线中，较落后的测量方式手段和年代久远的地图是导致设计误差的重要原因。

In traditional EHV line routing design, unsophisticated surveying methods and aging maps are the main sources of design error.

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目前，对试油排液量进行计量通常采用的是人工计量的方法。这种方法计量误差大，技术手段落后。

At present, for the volume of flowing back, the metering method made by man has many measuring errors and its technique has been lag behind.

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