hole crack

crack at hole

web hole fatigue crack

crack nucleus-shaping and crack expansion

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

(I) crack

Ⅰ crack extension

Ⅰ+Ⅱmode crack

Ⅰ-Ⅱ mixed mode crack

Ⅰ-mode crack

3D crack

3-D crack