 |
| |||
| oil refining | |||
| petroleum refining | |||
| oil refining The separation of petroleum mixtures into their component parts | |||
| refinação de petróleo: 4 phrases in 2 subjects |
| Environment | 3 |
| Labor law | 1 |
|
| |||
| oil refining | |||
| petroleum refining | |||
| oil refining The separation of petroleum mixtures into their component parts | |||
| refinação de petróleo: 4 phrases in 2 subjects |
| Environment | 3 |
| Labor law | 1 |