Rongyu Zhang

2 Patents

• US123787552025

  Water Tank Drainage Volume Control Structure, and Toilet

  XIAMEN R&T PLUMBING TECHNOLOGY CO., Ltd.

  0 cites
• US118983372024

  Effort-saving Flap-type Drain Valve

  XIAMEN R&T PLUMBING TECHNOLOGY CO., Ltd.

  0 cites