연구
Coal Mining IV
CategoryEconomy
Queuemain
Tier4
Research levels
| Level | Effects | Prerequisites | Costs | Power | Time |
|---|---|---|---|---|---|
| 1 | Coal Gathering Speed 16% (16) | building: research-center 26；research: iron-output-iv 1 | Coal × 180000、Iron × 46000、Meat × 930000、Steel × 12000、Wood × 930000 | 2000 | 7h 46m 40s |
| 2 | Coal Gathering Speed 16% (32) | building: research-center 27 | Coal × 260000、Iron × 65000、Meat × 1300000、Steel × 16000、Wood × 1300000 | 2000 | 11h 40m |
| 3 | Coal Gathering Speed 21.5% (53.5) | building: research-center 28 | Coal × 550000、Iron × 130000、Meat × 2700000、Steel × 36000、Wood × 2700000 | 2687 | 1d 7h 6m 40s |