孔底起爆技术
Hole-bottom Blasting Technique
逐孔起爆
Hole-by-hole initiation
hole by hole initiation
Hole-by-hole Blasting
hole by hole blasting
hole by hole initiating
hole by hole detonating
hole-by-hole detonation
short delay inside the holes
逐孔起爆技术
hole by hole blasting technique
Hole-by-hole technique
Hole-by-hole Blasting
by hole detonation technology
被砾石与地层砂混合物充填的射孔孔道
gravelsand filled perforation tunnel
长孔爆破
blasting with long bore hole
longhole demolish
long hole
抽采孔孔距
distance of the gas drainage
大孔孔分布
macro-pore size dis-tribution
大直径深孔爆破
large diameter deep hole blasting