תעשיות ישימים
אנרגיה & כרייה, tunneling
Drill bit
EX, EXX, ES, ESS, Clay bit, EC, ECC
Special treatment
Hot-zipped galvanization bar
Application
Tunneling, mining, civil engineering
Thread direction
Left-hand & Right-hand
Accessories
nut, coupler, centralizer, plate, drill bit
Usege
drilling and grouting simultaneously