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开坯孔型
把方形或矩形的大断面钢锭或钢坯轧成小断面的方坯或板坯,使轧件的断面面积缩小,长度增加,为后面孔型提供合适轧件尺寸的孔型。又称延伸孔型。
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Nanjing University
Nanjing University Library
Nanjing University of Aeronautics and Astronautics
Nanjing University of Chinese Medicine
Nanjing University of Posts and Telecommunications
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Nanjing Xian
Nanjing Yangtze River Bridge
Nanjing Ye Shan Guojia Kuangshan Gongyuan
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Nanjing Yunjin Museum of China
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Nanjing Zijin Shan National Forest Park
Nanjixian drum music ensemble in Zhouzhi county, Shaanxi province
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Nanju opera
Nanju Opera Study Institute of Laifeng County
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Nankai Qu
Nankai University
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