The diagram illustrates the process that is used to manufacture bricks for the building industry. Summarize the information by selecting and reporting the main features and make comparisons wherre relevant.

The flow chart given illustrates how bricks are produced for and delivered to the building industry. From an

overall

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perspective, it is evident that there are seven stages in the whole brick-producing process, beginning with clay excavation and ending with the delivery of the finished products to customers. The process begins with using a big digger to excavate clay. To get rid of oversized pieces, clay is placed on a metal grid, and smaller pieces drop onto a large roller before being mixed with sand and water. After being shaped by using a wire cutter or mould, they are moved to a drying oven for 24 to 48 hours. In the fifth stage, the bricks are fired in a special kiln at a moderate temperature (200oC to 980oC). Afterwards, they continue to be heated for the second time at a higher temperature (870oC to 1300oC) in another kiln. Before being packaged in the sixth stage, the bricks are treated in a cooling chamber for 42 to 72 hours. The entire brick-producing process concludes after the final products are transported to the customers.