短语词组短语Blasting Similarity Theory 爆炸相似律Discussion on blasting crater theory 爆破漏斗理论探讨rock blasting theory 岩石爆破理论Multi -border blasting theory 多边界爆破理论multi -boundary blasting theory 多边界爆破理论theory of blasting 爆破理论 返回 blasting theory