Certificate No. : 7176306, Patent No. : ZL 2017 2 1131429.X.

In 2017, the company continuously study, developed a practical new type of device "the outer wall of steel pipe automatic cleaning device", in April 2018, its obtained thePatent Certificate issued by the StateIntellectual Property office of the People's Republic of China.

Certificate No. : 7176306, Patent No. : ZL 2017 2 1131429.X.