Conclusion: coronary artery perforation was severe acute complication during percutaneous coronary intervention. The prognosis was good if treated properly, but maybe death if treated improperly.
结论：冠状动脉穿孔系冠心病介入治疗急性严重并发症，处理适当预后良好，处理不当将致严重后果，甚至死亡。
Bad strata are often encountered in the process of drifting in mines, if improperly treated, they will lead to serious deformation of drift, even collapse, so as to increase the amount of repair work.
在矿山巷道掘进施工中，经常会遇到不良岩层，若处理不当，会导致巷道严重变形，甚至坍塌，使返修工作量增大。
Bad strata are often encountered in the process of drifting in mines, if improperly treated, they will lead to serious deformation of drift, even collapse, so as to increase the amount of repair work.
在矿山巷道掘进施工中，经常会遇到不良岩层，若处理不当，会导致巷道严重变形，甚至坍塌，使返修工作量增大。
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