Patents/Inventors

Yanhui Zhong

HenanCN1 patent

2 Patents

US123718692025
Grouting Pipe with Vibration Function
SAFEKEY Engineering Technology (Zhengzhou), Ltd.
0 cites
US121523602024
Vibratory Grouting Drilling Rig with Auxiliary Moving Mechanism
SAFEKEY Engineering Technology (Zhengzhou), Ltd.
0 cites