Hefei Cement Research Design Institute Export product to Vietnam Yuanhe φ4 2×13m 2 pieces Tongpeng Cement Joint Stock Company of Vietnam Cement clinker production line φ4 2×13m 1 piece Jiangxi Baohuashan Group Gan County Cement Co Ltd φ4 2×13m 1 piece Penglai Linyuan Cement Co Ltd φ4 2×13m 1 piece Sichuan Luzhou Tuojiang