Inventor

MA MEIQIN

CN2 patents

Patents

2 patents

US12422041B2Sep 23, 2025

Y-shaped packer

HENGXIANG TECH INC LTD0 citations44

US11634879B2Apr 25, 2023

Tower packer for packing cement slurry of jacket

HENGXIANG TECH INC LTD0 citations32