Hangzhou Xinchen Import and Export Co.,ltd
ADD: Room 2015, Jiarui Square, Tonghui Middle Road 707, Xiaoshan District,
Hangzhou,311201,China
EMAIL: info@xinchenfast.com
What is the difference between a cold head nut and a hot head nut?
Cold sputum: It is the use of metal plasticity, cold pressure mechanics for pressure or cold drawing, to achieve the purpose of solid metal deformation.