Tolong jelaskan mengenai Long steel dari Keluli dalam bahasa melayu

As supports in reinforced concrete

Structural steel in modern buildings and bridges

The inside and outside body of automobiles, trains, and ships.

Duncan Burn; The Economic History of Steelmaking, 1867-1939: A Study in Competition. Cambridge University Press, 1961 online version

J. C. Carr and W. Taplin; History of the British Steel Industry Harvard University Press, 1962  online version

Gernet, Jacques (1982). A History of Chinese Civilization. Cambridge: Cambridge University Press.

Harukiyu Hasegawa; The Steel Industry in Japan: A Comparison with Britain 1996 online version

Needham, Joseph (1986). Science and Civilization in China: Volume 4, Part 1 & Part 3. Taipei: Caves Books, Ltd.

H. Lee Scamehorn; Mill & Mine: The Cf&I in the Twentieth Century  University of Nebrasa Press, 1992 online version

Warren, Kenneth, Big Steel: The First Century of the United States Steel Corporation, 1901-2001.'' (University of Pittsburgh Press, 2001) online review