Ubwino:
Ulusi wa trapezoidal umatchedwanso Aike ulusi wamkazi.Ulusiwo ndi wochepa pang'ono, koma ukhoza kusinthidwa ndi nati mutatha kuvala.Metric ulusi angle ndi madigiri 30, ndipo inchi ulusi angle ndi 29 madigiri.Nthawi zambiri amagwiritsidwa ntchito popangira screw screw ya lathe.Chizindikiro ndi "TR".
Timagwiritsa ntchito zida zachitsulo za tungsten kuti zitsimikizire kukhazikika kwazinthu kuchokera kuzinthu zopangira
Fananizani zokutira zoyenera malinga ndi zida zogwirira ntchito.Tithokoze zida zopangira ulusi wapamwamba kwambiri kuti zitsimikizire zokhazikika pazogulitsa zathu.