Geotechnical Engineering with Plaxis V20 2D - Anak Teknik
2d 20D20s are used for resolving skill tests, and for rolling on certain large tables. Often, two or more d20s will be required. This is noted as Xd20, where X is the number of dice to be rolled.『20プロジェクト』!「」が20をえる2025からアニメ「」が20をえる2026までは20イヤーとします!