�?�?t ρ l k + �?�?x i ρ l k v l = �?�?x j μ + μ t σ k �?k �?x j + G k �?ρ l ε �?Y M Comparing time demanded for parallel fractures and wedge fractures to achieve secure loss, it's uncovered that there is a diameter growth at the doorway of the wedge fracture relative on the exit. The existence of the expansion impa