adjustment access plate
Access Hole
取数孔
进出孔
存取孔
出入孔检修孔人孔
出入孔检修孔
出入洞
检查孔
出入孔
进入孔
工艺孔
甲板工艺孔
检视孔
人孔
入孔
检修孔
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
2-d restrain adjustment
2D restraint adjustment
6RA70 full digital DC velocity adjustment device