WasherJuly 11, 20231. The definition and types of washer Washer , also known as O-ring, is a circular section of the sealing element, the material is usually made of rubber, silicone rubber, fluorine rubber and other po...view
Pre-tightening Force For Fatigue Fracture Of Bolt FastenersJuly 4, 2022Similar to other metal parts, fastener failures include overload, corrosion-related cracking, embrittlement, creep and fatigue. Due to external loads, fastener overload may occur during installation o...view
PetroChina Participated In The China Independent Brand Expo In 2021July 1, 2022On May 10, the 2021 China Independent Brands Expo and International Forum opened in Shanghai.Duan Liangwei, director of the Group and deputy secretary of the Party Leadership Group, attended the openi...view