GB/T 20704-2006

Active

Rock drilling - Rotary drill-rods and rotary drill-bits for dry drilling - Connecting dimensions

岩石钻孔 干式钻杆和钻头 连接尺寸

Standard Type
GBT
ICS
73.100.30
CCS
D91
Status
现行
Issue Date
2006-12-20
Implementation
2007-05-01
Responsible Dept
中国煤炭工业协会
Drafting Unit
N/A