掏槽爆破参数
cut blasting parameters
parameters for initial cut blasting
掏槽挤压爆破
cutting compression blasting
掏槽扩邦法
Center cut and side enlargement method of construction
五角空心掏槽
pentagon hollow cutting-in
楔形掏槽
Sub-sub-wedge Undercutting
wedge cut
plough cut
wedge shaped cut
wedge-shaped slot
lewis cut
Wedge-shaped Cutting
斜眼分段掏槽
section-cut for oblique hole