| • rubbing test | |
| घर्षण: friction grinding grind abrasion polishing abrade | |
| परीक्षण: check mental testing psychometric test experiment | |
घर्षण परीक्षण अंग्रेज़ी में
[ gharsan pariksan ]
| • rubbing test | |
| घर्षण: friction grinding grind abrasion polishing abrade | |
| परीक्षण: check mental testing psychometric test experiment | |
