1. Takhala tikulamulidwa mosamalitsa ubwino wa zipangizo zathu, ndipo zitsulo zathu zonse zimachokera ku zitsulo zodziwika bwino (mafakitale). Ndipo kusanthula kwa metallographic ndi kuyesa kwa mankhwala kumagwiritsidwanso ntchito kuwonetsetsa kuti zinthu zili bwino.

2. Kuyang'aniridwa kwachangu kudzachitika panjira iliyonse yopangira, ndipo kuwunika kwathunthu kudzakhazikitsidwa pazogulitsa zopangidwa ndi ulusi.

3. Zogulitsa zathu zogulitsa kunja zidzawunikidwanso mosamalitsa musanagwiritse ntchito.

4. Chiyembekezo chathu chotengera zinthu zomaliza ndichokwera kuposa 30%

● Zida zoyesera