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常规注水泥
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常规注水泥
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primary cementing
常规注水泥
用相关设备把配置好的水泥浆从套管内注入,从套管柱(串)底部沿环形空间上返到预定井深,以达到设计段的套管与井壁间的有效封固的方法。
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education made us what we are
education management
Education Management Branch of China Education Association
Education Management Information Centre,Ministry of Education
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education management system
education meta-evaluation
education of children with blindness/visual impairments
Education of Chinese Opera
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Education of Information Interaction Design in China
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Education of Native People in Canada
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education on core socialist values
education on the outstanding traditional culture of the Chinese nation
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更新时间:2025/12/18 8:54:09