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.
A remote-entry key fob is not your average keychain accessory. These small plastic controllers are a big convenience for car owners. Key fobs are an integral component of a keyless entry system. Locking and unlocking a car with a key fob is as easy as pushing a button.