| Query | User |
|---|---|
| black thunder coal mine in wyoming | entered by user 1444647 |
| black thunder mine | entered by user 14963593 |
| canadian oil sands | entered by user 3107438 |
| caterpillar 797 | entered by user 7877280 |
| caterpillar 797 | entered by user ditto |
| caterpillar 797 | entered by user ditto |
| colorado coal mines | entered by user 15042019 |
| conveyors | entered by user 12550247 |
| copper mine | entered by user 4654363 |
| diamond mines | entered by user 3938341 |
| ekati mine in canada | entered by user 1073395 |
| ensdorf germany | entered by user 3684563 |
| fort mcmurray oil sands | entered by user 6476355 |
| gold mines in nevada | entered by user 4477691 |
| gold mines in nevada | entered by user ditto |
| hydraulic drive system | entered by user 1783194 |
| mining centrifuge | entered by user 11177618 |
| mining truck tires | entered by user 1629487 |
| putzmeister pump | entered by user 3336817 |
| screen vibration | entered by user 4114522 |
| self cleaning pond filters | entered by user 4959567 |