Dear Helsinki [Expansion joint] customer, thank you for visiting Innovation pipeline official enterprise website! Over the years, Helsinki Helsinki Waterproof casing Expansion joint honest cooperative enterprise Zhongyuan valve fittings enterprise international customer site has insisted on taking research and development as the basis of survival, and has continuously improved the application of new technologies in [Expansion joint] products! Good products in China, serving customers from all continents！ If you want to know more about the application of [Expansion joint] product new technology in practice, please call Innovation pipeline [Expansion joint] technical engineer to learn more first-hand information!