精密深孔钻孔工具
precision deep hole drilling tool
大直径预钻孔
big diameter pre-borehole
深孔预裂爆破
deep hole pre-splitting explosion
Deep-hole Pre-splitting Blasting
deep-hole presplitting explosion
deep-hole pre-splitting explosion
pre-cracking blasting with deep borehole
deep borehole pre-cracking and blasting
pre-fracturing blasting with deep boreholes
深孔预裂控制爆破
Deep-hole Pre-splitting Control Blasting
预钻孔取土
soil taking of pre-bored perforation
冲击式深孔钻机
long-hole percussive machine
大孔钻孔
big-diameter hole drilling
多轴深孔钻床
multi-spindle deep hole drilling machine
高效小直径深孔钻削系统
high efficiency drilling system for small and deep hole