L = ∮ p n ⋅ k d S , displaystyle L=oint pmathbf n cdot mathbf k ;mathrm d S, D p = ∮ p n ⋅ i d S , Y = ∮ p n ⋅ j d S . displaystyle get started aligned D_ p &=oint pmathbf n https://garage-ceiling-lift93589.prublogger.com/32615257/lift-things-to-know-before-you-buy