中国黑龙江省双鸭山市 Shuangyashan Municipality, Heilongjiang Province, China

双鸭山东方墙材集团有限公司 - 煤矸石、粉煤灰、页岩等烧结空心砖技术的开发生产及设备制造
Shuangyashan Oriental Wall Material Co Ltd - brick making production line with clay, gangue, fly ash and shale and tunnel construction