"medium" . "A transfer medium is the role of a material that carries the transfered flow. [Allotrope]" . . "transfer medium role" . "http://www.jfsowa.com/ontology/thematic.htm" . "https://en.wikipedia.org/wiki/Transmission_medium" . . . "A transmission medium is a material substance (solid, liquid, gas, or plasma) that can propagate energy waves. For example, the transmission medium for sounds is usually a gas, but solids and liquids may also act as a transmission medium for sound. The absence of a material medium in vacuum may also constitute a transmission medium for electromagnetic waves such as light and radio waves. While material substance is not required for electromagnetic waves to propagate, such waves are usually affected by the transmission media they pass through, for instance by absorption or by reflection or refraction at the interfaces between media. [Wikipedia]" . "A transfer medium is the role of a material that carries the transferred flow. [Allotrope]" . .