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有一发明是在碳钢齿轮制造过程中,用较为廉价的B来代替在Cr-Mo钢和Ni—Cr—Mo钢等低合金钢中昂贵的Ni、Cr、Mo元素。与以往
One of the inventions is to replace the expensive Ni, Cr, Mo elements in low-alloy steels such as Cr-Mo steels and Ni-Cr-Mo steels with cheaper B in carbon steel gear manufacturing. With the past