pumping hole (well) 中文意思是什麼
pumping hole (well)
解釋
抽水孔(井)-
A model of nonartesian - artesian pumping well and new techniques of " water dam " hole - well cleaning are put forward
提出了無壓承壓井抽水模式和「攔水壩」式沖孔洗井等新工藝。
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