The spatial variability of plentiful water aquifer top layer and aquifer floor elevation in Sanhuhe irrigation field is researched using the Geostatistics.
运用地质统计学理论，对三湖河灌域的富水岩层顶板及含水层底板高程进行空间变异性分析。
The invention relates to a final elevation control method for open caisson construction, belonging to the technical field of open caisson construction.
本发明涉及一种沉井工程最终高程控制方法。本发明属于沉井工程技术领域。
In high elevation zones, the operational current of ESP is larger, the field voltage is lower and its collection efficiency is unsatisfactory.
高海拔地区电除尘器运行电流大、电场电压低，除尘效率往往不高。
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