FTR is a British rapid-transit bus system, currently in operation in Leeds, Luton and Swansea.irst Group has introduced the system, using Wright StreetCar articulated buses in conjunction with infrastructure upgrades by local authorities. The vehicles have been branded as the future of travel, the operators claiming that ftr is textspeak for the word future.
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs. Its major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3).
The main constituent of limestone is calcium carbonate (CaCO3). Lime and limestone large used as building material; it is also an important raw material for many industrial. Limestone can be directly processed into stone and lime. Lime can be categorized into ordinary lime and hydrated lime.it is required the use of crushing and grinding equipment process in limestone.