SEARCH Articles Figures Tables Mutual inductivity load M as a function of the average spacing between two individual lines. Average distance, a, with equivalent counter-inductivity for an oblique approach with distances 3, and 32 at the end of the close proximity 16 Hz and p 30 m. [Publishers Imprint] [Publishers Imprint] See Also: Mutual inductivity load M as a function of the average spacing between two individual lines. Average distance, a, with equivalent counter-inductivity for an oblique approach with distances 3, and 32 at the end of the close proximity 16 Hz and p 30 m.