G-3相关论文
Repacking practice for G-3 engineering driller power unit with drive shaft of dual channel reverse c
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Repacking practice for G-3 engineering driller power unit with drive shaft of dual channel reverse c
In order to satisfy operating requirements for constant core drilling technology in reverse circulation with hollow-thro......
