Which is used for raising and lowering rods of circular cross section
A. Bull dog
B. Sludger
C. Core barrel
D. Retaining key
Answer: Option A
This Question Belongs to Mining Engineering >> Coal Mining
Related Questions on Coal Mining
The required water for 1 ton of sand in hydraulic sand stowing is . . . . . . . .
A. 800 l
B. 600 l
C. 1100 l
D. 1200 l
Join The Discussion