re-perforation相关论文
BACKGROUND Primary endoscopic closure of a perforated gastric wall during endoscopic procedures is mostly effective and ......
大庆油田已进入高含水开发后期,薄层开发所占比例越来越大,射孔质量的好坏,直接关系到油气的开发和利用。当前面临的问题是新、老油井......