Applicable to the industry including: electronic passive component manufacturing, iron manufacturing, metallurgy industry, semiconductor, optoelectronics industries.
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China’s iron manufacturing industry produced one hundred twenty thousand tons a year—an amount not equaled the West until the twentieth century.
当时，中国钢铁年产量12万吨，西方国家直至20世纪才迎头赶超。
Safety of installed in the front roll bearing and the distance between the screw, it cast iron manufacturing, the sensitivity is high, easy to be destroyed.
安全片装在前辊轴承与调距螺杆之间，它用铸铁制造，其灵敏性高，容易被破坏。
In 1920, the United States led the world in iron and steel manufacturing.
美国的钢铁制造业在1920年领先于世界。
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