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extra-heavy pipe
chem. 厚壁管
dril. 加重管; 厚壁钻杆
oil 加重管子
extra heavy pipe
tech. 特强管; 加重管; 粗管; 特重管 (子); 特厚管; 加厚管
extra-heavy pipe: 8 phrases in 5 subjects
Drilling1
Engineering geology1
Mechanics1
Oil / petroleum2
Technology3

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