Petro China's first key scientific and technical project—the5 kt/a hexane-1 unit has been set up at Daqing Petrochemi-cal Complex (DPC).DPC is engaging in strenuous effortsfor
文摘Petro China's first key scientific and technical project—the5 kt/a hexane-1 unit has been set up at Daqing Petrochemi-cal Complex (DPC).DPC is engaging in strenuous effortsfor