所述polowera WA大号季诺ofukula madzi wolandila ID ODF(焊接)kugwirizana mpweya zitsulo。Kubwereketsa ID anasonkhana
NDI zeka wolemera valve.But zonse ZA polowera NDI kubwereketsa一个L-19,L 23,L 29 anasonkhana NDI kudula-kuchokera valces.All
zitsanzo ZA apangidwa NDI 1/4“chitetezo -18NPT kugwirizana vavu