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光杆 guānggǎn
dril. slick rod
mining. polished rod
深井泵的光杆 guānggǎn
tech. polish rod
光杆: 59 phrases in 13 subjects
Agriculture1
Automobiles6
Aviation1
Chemistry1
Dermatology1
Drilling1
Earth sciences2
General2
Mechanics1
Mining4
Oil / petroleum14
Technology24
Telecommunications1