Inventor

WU ZHONGYA

CN2 patents

Patents

2 patents

US10895154B2Jan 19, 2021

Base mechanism of single prop capable of being unloaded at reduced pressure

UNIV CHINA MINING1 citations58

US11021954B2Jun 1, 2021

Method of recovering room-and-pillar coal pillar by using external replacement supports

UNIV CHINA MINING0 citations55