N'ihi na a na-ewepụ ihe niile mandrel mgbe akụkụ abụọ nke countersunk isi kpuru ìsì rivet , ihe nke mandrel agaghị emetụta corrosion nguzogide nke igwe anaghị agba nchara okpukpu abụọ countersunk isi rivet.Ọzọkwa, igwe anaghị agba nchara dị oke ọnụ karịa ígwè.Iji chekwaa ego, a na-eji ígwè mee isi ntu.
Oge nzipu: Eprel-14-2022