�?�?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 pure fractures encountered in the particular drilling system usually are not parallel fractures https://edenw947fve6.dreamyblogs.com/profile