
State Grid 10-35kV cable permission certificate

State Grid 110kV and above cable permission certificate

Chine Southern Power Grid stair material supplier evaluation notification

Sinopec material supplier

CNPC material supplier permission certificate

CNPC Huabei Oilfield branch market permisson certificate

Daqing oilfield permission certificate

Mine product safety mark certificate

Zhejiang province public resource trading center trading card

Inner Mongolia Power preliminary qualified notification