... of Shandong Zhongtian Industry Co., Ltd (Former Name: Jinan Dinghan Building Materials Co., Ltd, and Jinan Donghan Building Materials Co., Ltd), it mainly ... Rubbed Copper, which received high reputation from the customersZhongtian Industry Co., Ltd covers an area of 100,000 Square Meters, ... in China.With more than 20 years efforts, based on the “credit and win-win policy”, Zhongtian Industry Co., Ltd ...