A na B mu mubare w'uruhererekane bivuze iki?

Hariho urukurikirane rubiri rwa A na B mu mubare w'uruhererekane. Urukurikirane rwa A ni ingano ijyanye n'ibipimo ngenderwaho by'uruhererekane rw'Abanyamerika: urukurikirane rwa B ni ingano ijyanye n'ibipimo ngenderwaho by'uruhererekane rw'i Burayi (cyane cyane mu Bwongereza). Uretse urwego rumwe, zifite imiterere yazo mu zindi ngingo. Itandukaniro nyamukuru ni iri:
1) Ubunini bw'icyapa cy'imbere cy'umunyururu n'icyapa cy'inyuma cy'ibicuruzwa bya A birangana, kandi imbaraga zingana z'imbaraga zidahinduka ziboneka binyuze mu guhinduranya gutandukanye. Icyapa cy'imbere cy'umunyururu n'icyapa cy'inyuma cy'ibicuruzwa bya B birahinduka kugira ngo bingane, kandi imbaraga zingana z'imbaraga zidahinduka ziboneka binyuze muri Baidu zitandukanye.
2) Ibipimo by'ingenzi bya buri gice cy'uruhererekane rwa A bifite igipimo runaka ku isonga. Nk'ibi bikurikira: umurambararo wa pini = (5/16) P, umurambararo wa roller = (5/8) P, ubugari bwa chain plate = (1/8) P (P ni isonga rya chain), n'ibindi. Ariko, nta gipimo kigaragara kiri hagati y'ingano y'ingenzi n'isonga rya B series.
3) Kugereranya agaciro k'umutwaro ucika ku migozi y'urwego rumwe, uretse ko ibisobanuro bya 12B by'uruhererekane rwa B biri hasi ugereranyije n'iby'uruhererekane rwa A, ibindi bisobanuro ni bimwe n'ibicuruzwa by'uruhererekane rwa A by'urwego rumwe.

Igipimo ngenderwaho cy'ibicuruzwa kingana n'igipimo ngenderwaho mpuzamahanga cya ISO9606: 1994, kandi imiterere y'ibicuruzwa byacyo, ingano yabyo n'agaciro k'umutwaro wabyo bihuye neza n'igipimo ngenderwaho mpuzamahanga.
Imiterere y'inyubako: Urunigi rugizwe n'ibice by'imbere by'umunyururu, imigozi n'amaboko, bifatanye n'imigozi y'inyuma, bigizwe n'ibice by'inyuma by'umunyururu n'imigozi y'inyuma.
Mu guhitamo ibicuruzwa, ibisobanuro by'urunigi bisabwa bishobora gutoranywa hakurikijwe umurongo w'ingufu. Iyo bitoranyijwe hakurikijwe uko bibarwa, igipimo cy'umutekano kigomba kuba kirenze 3.