blasting of large spacing and small burden

Large Hole

large hole distributing plate

Large Hole Distributional Plate

large hole formation

Large Spacing

large spacing of pile

Large-hole

vessel subject to internal pressure with large hole

bottom hole spacing

drill hole spacing

Hole Spacing

Hole spacing of maize

hole spacing pattern parameter

Wide hole spacing

large inclination angle and large mining height

A shrinkage method combining with medium-length hole and shallow hole

hole by hole blasting

hole by hole blasting technique