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casing program
dril. 井身结构
oil 套管程序
tech. 钻孔加固设计; 入井套管层数
casing programme
dril. 套管程序; 井身结构
tech. 钻孔加固设计; 入井套管层数
casing program
: 3 phrases in 2 subjects
Drilling1
Oil / petroleum2

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