| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| coal petrography pdf | 1.89 | 0.7 | 1069 | 60 | 20 |
| coal | 0.46 | 0.1 | 494 | 40 | 4 |
| petrography | 1.86 | 0.4 | 3456 | 100 | 11 |
| 1.41 | 0.1 | 2514 | 44 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| coal petrography pdf | 0.9 | 0.9 | 385 | 31 |
| coal petrography ppt | 1.05 | 0.5 | 7815 | 34 |
