Nyob ntawm cov ntawv hlais, lawv feem ntau muab faib ua Square billets (cov duab plaub): me me square billets, loj square billets Round billets: me me round billets, loj round billets, hollow rounds Slabs: me me slabs (flat slabs), tsis tu ncua slabs, dav thiab tuab slabs, nyias ...
Nyeem ntxiv