Nyika dzakasiyana munyika dzine mazita akasiyana esimbi isina tsvina. Musika uyu unowanzo sangana neChina neUnited States, inonzi chiyero chenyika uye chiyero cheAmerica.
Iwo mazana maviri akatevedzana, mazana matatu akatevedzana, uye mazana mana akatevedzana ataurwa pamusoro ndiwo maitiro eAmerica. Nekuti maAmerican mwero ari nyore kunzwisisa, anowanzo kunzi Iwo ese maAmerican Standards.
National Standard ============== American Standard
1cr17mn6ni5n========201
1cr18mn8ni5n========202
0cr18ni9=============304
00cr19ni10===========304L
0cr18ni12mo2t=======316Ti
00cr17ni14mo2=======316L
0cr17ni12mo2=========316
1cr18ni9ti===========321
0cr18ni10ti==========321
0cr23ni13============309S
1cr20ni14============309S
0cr25ni20============310S
1cr25ni20============310s
0cr13================405
1cr13================410
2cr13================420
3cr13================420
4cr3=================430
Nguva yekutumira: Ndira-19-2020