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Raw Materials for Welding Consumables
Welding Consumables & Equipment
Refractory Raw Material & Product
Metallurgical Raw & Subsidiary Material
Chemical Product
Resource Importing
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Longstone has been oriented in welding flux materials, metallurgical raw materials, and the importing of mineral resources. Mainly focus on,

  • Raw Materials for Welding Consumables
  • Welding Consumables & Equipment
  • Refractory Raw Material & Product
  • Metallurgical Raw & Subsidiary Material
  • Chemical Product
  • Resource Importing
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