#  E\_eff\*d\_e + W\_s\*C\_s=0 

 



   ![E_eff*d_e + W_s*C_s=0](/sites/g/files/omnuum12126/files/styles/hwp_1_1__720x720_scale/public/2026-09/edm_cs_element_directions_top_legends.png?itok=okGIo07A)