河南省煤田地质局
P634.4 2
Coalfield Geology Bureau of Henan Province
袁志坚.大直径气举反循环成套钻具的研制[J].钻探工程,2014,41(12):44-48.
YUAN Zhi-jian. Development of Complete Set of Large Diameter Air-lift Reverse Circulation Drilling Tool[J]. Drilling Engineering, 2014,41(12):44-48.