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泥饼刷
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泥饼刷
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套管程序
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mud scratcher
泥饼刷
由钢丝和环状本体组成,安装在套管外壁,下套管时,用来刮削井壁泥饼,从而提高水泥环胶结质量的固井工具。
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formal methods
formal methods in analythizing cryptographic protocols
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