�?�?t ε l ρ l v l + �?�?ε l ρ l v l v l = ε l �?�?τ l + ε l ρ l g �?ε l �?p �?β v l �?v s The normal fractures encountered in the particular drilling course of action aren't parallel fractures https://matters.town/a/ucbfrskrs31e