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.
Remote keyless system. A remote control for a keyless entry system built into an ignition key. Pressing a button on the key unlocks all of the car doors. Another button locks the car. A keyless entry system is an electronic lock that controls access to a building or vehicle without using a traditional mechanical key.