rdfs:comment At a fixed point in a medium, the direction of, media with different temperatures, the direction, the area dA of the element, and direction eφ in @en
https://w3id.org/emmo#EMMO_967080e5_2f42_4eb2_a3a9_c58143e835f9 the area dA of the element, and direction eφ in, the direction of propagation of heat. @en