The patent of Henan Shunying application was successful.

Henan Shunying applied for a patent for a corrugated compensator that can increase service life on April 20, 2020, and the authorization was completed on November 20, 2020

Henan Shunying applied for a patent for a flanged rubber expansion joint on April 20, 2020, and the authorization was completed on November 20, 2020