Bituminous emulsions , fluxed and cut-back bitumen factory production control .
沥青乳剂,软质沥青和轻质沥青工厂生产控制。
Bituminous coal and lignite-surface mining : state market index .
烟煤和褐煤地表挖掘：国家市场指数研究。
Being an accredited enterprise of international quality system iso9001.the group has nine exclusively-owned or shareholding subsidiaries as follows : photoelectrical technology , bituminous concrete delivery , road surface materials , car transportation , equipment monitoring , experimental examination , real estate development , tourism , labor agency and overseas project .
