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structural steel造句
31. In this paper the fabrication process of box column in structural steel building construction is introduced. 32. The blast may deflect structural steel frames, collapse roofs, dish - in walls, shatter panels, and break windows. 33. This paper is to study the effect of PCVD deposited layers on the wear resistance and hardness of structural steel. 34. Key parameters measured are bond stress and slip between structural steel and concrete.