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套管腐蚀孔洞由于地表浅层水的电化学作用,长期作用在套管某一局部位置,或由于螺纹不密封等长期影响,套管某一局部位置将会因腐蚀而穿孔,或因注采压差及施工压力过程而破损形成孔洞或破裂
expl. corroded holes of casing

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