four martin
| acide
| four Martin | |
| met. | hearth furnace; open hearth furnace; open-hearth steel furnace; Siemens Martin open hearth furnace |
| tech. | open-hearth furnace |
| acide | |
| agric. fish.farm. chem. | acid |
| chem. | sour |
| chem. met. | acidic |
| econ. | acid |
| environ. | acids; acid |
| social.sc. health. | beast; microdots; sunshine; zen |
| |||
| hearth furnace; open hearth furnace; open-hearth steel furnace; Siemens Martin open hearth furnace | |||
| open-hearth furnace | |||
| |||
| open-hearth furnace | |||
|
four martin : 16 phrases in 2 subjects |
| Metallurgy | 12 |
| Technology | 4 |