Steam-based heating processes use latent heat and transfer it to a given product. When the work is done (i.e. steam has given up its latent heat), steam condenses and becomes condensate. In other words, condensate does not have the ability to do the work that steam does.
Subtransmission is part of an electric power transmission system that runs at relatively lower voltages. It is uneconomical to connect all distribution substations to the high main transmission voltage, because the equipment is larger and more expensive.
Transmission media is the means by which a communications signal is carried from one system to another. Transmission media is often used in computer communications. Transmission is sent through either an unbounded or bounded source, and may be transmitted through different wave forms and variations.