Typically, coke-oven gas is obtained from a battery comprising a number of narrow, vertical chambers, or ovens (0.5m wide, 5m high and 12m long) built of silica brick that are separated by heating ducts, such that heat is transmitted to the coal through both sides of the chamber walls.
ISO keyboard symbol for âControlâ. In computing, a Control key is a modifier key which, when pressed in conjunction with another key, performs a special operation (for example, +); similar to the Shift key, the Control key rarely performs any function when pressed by itself.
Keying is a specific way to facilitate the identification process for a particular group of organisms in a particular region (for which the key was prepared). Typically, such a key is a dichotomous hierarchy of decisions about whether the individual has or doesn't have particular features.