I. Examples: 1.⊥-⊥ Burgers vector forming jog 2.⊥-⊥ Burgers vector∥ forming kink 3. L-$ forming one jog, one kink, or two jogs 1. $- forming two jogs◆ Ⅱ.Examples: 1. ⊥-⊥ Burgers vector ⊥ forming jog 2. ⊥-⊥ Burgers vector ∥ forming kink 3. ⊥-$ forming one jog, one kink, or two jogs 4. $-$ forming two jogs A B C D 1 b  2 b    A B C D 1 b  2 b  A B C D 1 b  b2 