Zhichun Zhang

2 Patents

• US123507862025

  Apparatus for Automatically Polishing Butt Weld of Ultralong Large-diameter Pipeline

  CHINA RAILWAY NO. 3 ENGINEERING GROUP CO., Ltd.

  0 cites
• US116912662023

  Mounting Bracket and Self-propelled Robot

  Beijing Roborock Technology Co., Ltd.

  0 cites