DRILL ROD OPENING DEVICE FOR SECTIONAL ROD DRILLING EQUIPMENT
A Standard patent application filed on 16 June 1983 credited to Hakkinen, Leo
;
Paivalainen, Ossi
Details
Application number :
15858
Application type :
Standard
Application status :
CEASED
Under opposition :
No
Proceeding type :
Invention title :
DRILL ROD OPENING DEVICE FOR SECTIONAL ROD DRILLING EQUIPMENT