A shrinkage method combining with medium-length hole and shallow hole

hole by hole blasting

hole by hole blasting technique

hole by hole detonating

hole by hole initiating

hole by hole initiation

Hole-by-hole

mid-and-deep hole combining shallow hole balsting

sight hole peep hole

beef bung casing

bung

bung casing

bung down

bung end

bung fat

hog bung

rubber bung

Trollius chinensis Bung

Salvia miltiorhiza Bung