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.
Techopedia explains Access Control. For example, a key card may act as an access control and grant the bearer access to a classified area. Because this credential can be transferred or even stolen, it is not a secure way of handling access control. A more secure method for access control involves two-factor authentication.