1.ISO 9001-2008 approved 2.Hot-dipped galvanized,thermal spraying zinc 3.10kv-500kv 4.As your requirement Shandong Huaheng tower Co., Ltd,founded in 2000,specialized in the power tower,steel pipe tube tower,communication tower,steel structure and so on.It is an integrated professional enterprise.Our products are widely used by state government in the area of China Telecom,China Mobile,China ...