求翻译：武川500kV变电站工程施工图设计阶段岩土工程勘测任务受我院变电工程处委托，勘测工程处于2012年02月下旬进行了外业钻探工作。是什么意思？

The the Wuchuan 500kv substation construction map design phase geotechnical engineering investigation tasks entrusted by the hospital Transformation Agency investigation works are carried out outside the industry drilling in late February 2012.

takekawa 500 kV transformer design stage works geotechnical engineering investigation task I homes by transformer works, commissioned works in a February 2012 outside the late drilling work industry.

The wuchuan 500kV transformer substation project construction drawing design stage ground engineering surveying duty is changed my courtyard the electricity engineering department request, the survey project is in late February, 2012 to carry on the field operation probing.

Wuchuan 500kV transformer substation project construction design stage of rock-soil engineering survey tasks entrusted by the hospital project, drilling in a field investigation in late February 2012.

正在翻译，请等待...