Ungawahlukanisa kanjani amantongomane amancane e-countersunk rivet kumantongomane amakhulu e-countersunk rivet?

I-rivet nut ene-engeli engu-90 ° iyikhanda elikhulu elingaphansi kwe-countersunk, kuyilapho i-rivet nut ene-engeli engu-120 ° iyikhanda elincane elingaphansi kwe-countersunk.

Umehluko phakathi kwalokhu okubili:
1. I-engeli yekhanda ihlukile.
2. Ububanzi bangaphandle bekhanda buhlukile.