�?�?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 The natural fractures encountered in the particular drilling system are not parallel fractures having a uniform width https://2021directory.com/listings1161975/how-drilling-mud-loss-can-save-you-time-stress-and-money