Itandukaniro riri hagati yumunyururu wa 12B nu munyururu wa 12A

1. Imiterere itandukanye

Itandukaniro riri hagati yumunyururu wa 12B nu murongo wa 12A ni uko urukurikirane rwa B ari ubwami kandi ruhuza n’iburayi (cyane cyane Abongereza) kandi rusanzwe rukoreshwa mu bihugu by’Uburayi;Urukurikirane rusobanura ibipimo kandi bihuye nubunini bwihariye bwibipimo byabanyamerika kandi bikoreshwa muri Amerika no mubuyapani.n'ibindi bihugu.

2. Ingano zitandukanye

Ikibanza c'iminyururu ibiri ni 19.05MM, naho ubundi ubunini buratandukanye.Igice cyagaciro (MM):

Ibipimo by'urunigi 12B: diameter ya roller ni 12.07MM, ubugari bw'imbere bw'igice cy'imbere ni 11.68MM, diameter ya pin ya pin ni 5.72MM, n'ubugari bw'icyapa cy'urunigi ni 1.88MM;
12Ibipimo by'urunigi: diameter ya roller ni 11.91MM, ubugari bw'imbere bw'igice cy'imbere ni 12.57MM, diameter ya pin ya pin ni 5.94MM, n'ubunini bw'icyapa cy'urunigi ni 2.04MM.

3. Ibisabwa bitandukanye

Iminyururu yuruhererekane ifite igipimo runaka kumuzingo no kumapine, ubunini bwurupapuro rwimbere rwimbere hamwe nisahani yinyuma yinyuma bingana, kandi imbaraga zingana zingufu zihamye ziboneka binyuze muburyo butandukanye.Ariko, nta kigereranyo kigaragara hagati yubunini bukuru nicyiciro cyibice B bikurikirana.Usibye 12B ibisobanuro biri munsi yuruhererekane rwa A, ibindi bisobanuro bya B bikurikirana ni kimwe nibicuruzwa bya A.