| No |
Name of sample |
Source of sample |
| 1 |
Coal tar pitch |
Coking plants in Shanxi Province |
| 3 |
Coaltar oil |
Coking plants in Shanxi Province |
| 5 |
Petroleum Asphalt |
South Korea |
| 6 |
Residue after heavy oil cracking |
Oil refinery plant in XinjiangProvince |
| 7 |
Ethylene product residue |
Petroleum refinery plant in XinjiangProvince |
