Menene ma'auni na saka zaren waya, kuma menene buƙatun don albarkatun ƙasa?
Waya thread saka kasa da kasa misali A cewar DIN8140, MS21209, N913/N926A/N926B/N926C (GE na musamman), 1301-SCT 149+ Uen (Ericsson na musamman), BS 7752 (UK), MO-44421 (Toshiba Japan) an.. .
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