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联顶节
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联顶节
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套管程序
释
landing joint
联顶节
下套管时接在最后一根套管上用来调节套管柱顶面位置,并与水泥头连接的具有严格长度的短套管。
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soil map
soil map of China
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soil matrix
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soil mechanics test
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soil mercury vapor survey
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