短語詞組短語overbalance perforating 過平衡射孔overbalance detail 失衡過重perforating overbalance 正壓射孔overbalance drilling 過平衡鉆井zero overbalance 零值超平衡overbalance pressure 正壓static overbalance 靜態(tài)正壓overbalance E 失去平衡aerodynamic overbalance 氣動過量平衡 返回 overbalance