出生地 |
Sichuan |
牌子的名字 |
"chuan shi" Coring Bit |
模式的数量 |
IADC Code |
CQT405 IADC Code: MD6x5 1.Natural diamond 2.Double-cone crown design; 3.Natural diamond cutters of intermediate grain 4.It is suitable for medium to medium-to-hard formations and is widely applicable.