Inyungu:
1.Umuringainyama y'ingurube inyobwa nigishushanyo cyingurube zinywa neza no kubungabunga amazi.
2. Koresha imashini ya CNC yakozwe kugirango umenye neza.Kugirango ubuso bworoshe kandi budahungabana, kugirango umutekano w’amazi yingurube.Imiterere yoroshye hamwe no guterana byoroshye.3. Igicucu cyumuringa urinda igenamiterere kugirango umenye neza ko insipo idafunzwe nubutaka.
3.Huza 1/2 '' icyambu, hafi ya 20mm.byoroshye gushiraho, imiterere yoroshye,igihe kinini cyo gukoresha.