presplit aberration纵裂前畸变
presplit cut预裂掏槽
presplit hole预裂孔
horizontal presplit水平预裂
presplit blasting预裂爆破
cracking by presplit blasting预裂成缝
Peripheral presplit blasting周边预裂爆破
presplit controlled blasting technique预裂控制爆破技术
presplit blasting construction预裂爆破施工