Chengdu Bang Pu Cutting Tools Co., Ltd. and our company keep long-term cooperative gas relationship, long-term supply of helium.

Chengdu Hongke Electronic Technology Co., Ltd. and our company to preserve long-term cooperative gas relationship, long-term supply of liquid nitrogen.

Chengdu Special Co., Ltd. and my company to preserve long-term cooperative gas relationship, high purity acetylene, high purity hydrogen sulfide, carbon monoxide, high purity carbon monoxide, hydrogen chloride, high purity hydrogen chloride

China Southern Power Grid and our company to maintain long-term