Luyện thi THPT QG 2018Casting P2
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Casting P2
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The first commercial cupola in the United States was the Colliau cupola, which was introduced in 1874. This cupola was prefabricated insofar as possible and was built primarily as a commercial product. It was highly successful, being a fast and economical melting unit. When first introduced, it presented a number of improvements, such as a hot blast, and double rows of tuyeres. After the Colliau cupola, the Whiting cupola was developed. It is still sold by the company bearing the name of its inventor, John H. Whiting. In the 1880s, Whiting developed a cupola that employed two rows of tuyeres,...
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