Litlhaloso tse akaretsang tsa li-rivets tse foufetseng:
1. Ka kakaretso, ho na le letoto le tsheletseng la 2.4 / 3.2 / 4 / 4.8 / 5 / 6.4.
2. Bolelele ke letoto la 11 6-8 — 8.5 — 9.5 — 11 — 12.5 — 13 — 14.5 — 15.5 — 16 — 18 — 20.
3. Bolelele ba 'maraka ke 22-25-30-40-50-60 (mm).
4Theknoloji ea tšepe e sa hloekang ea bophara ba 3.2 e ka fihlela bolelele ba 16mm.
Nako ea poso: Phupu-08-2021