Dear Guangxi [Expansion joint] customer, thank you for visiting Innovation pipeline official enterprise website! Over the years, Guangxi Waterproof casing Expansion joint cooperative partner--Zhongyuan valve fittings Guangxi overseas customer service station 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! Made in China, sold worldwide！ 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!