The DGA ordered an extra three Sperwer aircraft in June.
DGA在六月还预订了三架额外的Sperwer飞机。
However, there are two different viewpoints for DGA method to diagnose power transformer fault position.
然而，对于采用DGA来诊断电力变压器故障部位的方法，目前仍存在能与不能两种观点。
However, there are two different viewpoints for DGA method to diagnose power transformer fault position.
然而，对于采用DGA来诊断电力变压器故障部位的方法，目前仍存在能与不能两种观点。
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