A shrinkage method combining with medium-length hole and shallow hole
hole by hole blasting technique
hole by hole detonating
hole by hole initiating
hole by hole initiation
mid-and-deep hole combining shallow hole balsting
air pocket
套囊
电磁信息泄漏
气陷
气囊
气潭
气阱
气穴
气袋
气窝
气坠
气泡
空气袋
气龛