Shaped charges of the same sort are underbalance perforated in three kinds of sandstones in the lab.

 
  • 在實(shí)驗室條件下,用同種聚能射孔彈在3種不同砂巖上進(jìn)行負壓射孔,然后進(jìn)行流動(dòng)測試。
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