The Yonghua glasses factory is specialized in producing the various types of glasses.
温州市勇华眼镜厂是一家专业生产各种眼镜的生产厂家。
Shantou Yonghua industrial company (Beijing business center) Wing-kai in Europe outside the business center of Connaught.
汕头永华达实业公司（北京营业中心）永外诺佳欧商贸中心。
In 1912, when China's largest chemical companies - Yonghua matches Ltd. was established Botou, "Botou matches" from famous within the four seas.
1912年，时为中国最大的化工企业——永华火柴有限公司在泊头成立，“泊头火柴” 从此名扬海内。
WANG Yonghua. Modern Electrical Control and PLC Application Technology [M]. Beijing: Beijing University of Aeronautics and Astronautics Press, 2013.
[3]王永华。现代电气控制及PLC应用技术[M]。北京：北京航空航天大学出版社，2013。
WANG Yonghua. Modern Electrical Control and PLC Application Technology [M]. Beijing: Beijing University of Aeronautics and Astronautics Press, 2013.
[3]王永华。现代电气控制及PLC应用技术[M]。北京：北京航空航天大学出版社，2013。
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