国产一性一交一乱一色情人,性爱av网站,一级 a一级 a 免费观看免免黄

  • ? 58+

    Technical Expert Teams

  • ? 120+

    Sales For Countries

  • ? 500+

    Company People

  • ? 100000Tons

    Annual Output

about Rongsheng

Zhengzhou Rongsheng is a kiln overall solution service provider integrating, refractory, graphite electrode, metallurgical auxiliary materials research and development, manufacturing, kiln installation, and international trade. It serves metallurgy, nonferrous metals, building materials, electricity, petrochemical and other industries.

The group's headquarters is located in Zhengzhou, Henan. The factory is located in Xinmi City, the "Capital of Refractory". Xinmi city is rich in high-quality mineral resources and is close to the two railway arteries of Longhai and Beijing-Guangzhou, providing unique conditions for the production and transportation of refractory products. The main business of Rongsheng Group is the research and development, production and sales of graphite electrodes, metallurgical auxiliary materials and refractory materials, and undertakes the overall contracting business of various thermal equipment installation and construction services.

more
  • Historical process
  • FAQ
 Home  Whatsapp  Mail  Message
青草人妻免费视频 成人免费A级毛片无码片2022 日韩av白人无码高清 激情综合色色色色 影音资源欧美性爱 香蕉久久久久久AV成人
蓝田县 开鲁县 延庆县 长武县 山东省 澄迈县
广昌县 达日县 卫辉市 威信县 深泽县 宜兰县
六安市 英德市 肥乡县 墨江 大港区 长乐市