Kuwunika kwa Nsalu

Nsalu iyi imatha kukumana ndi GB/T standard, ISO standard, JIS standard, US standard.Nsalu zonse zidzawunikiridwa 100 peresenti musanatumize malinga ndi American four point system standard.

Mbiri ya nsalu ya corduroy

Olemba mbiri ya nsalu amakhulupirira kuti corduroy idachokera ku nsalu ya ku Egypt yotchedwa fustian, yomwe idapangidwa pafupifupi 200 AD.Monga corduroy, nsalu ya fustian imakhala ndi zitunda zokwezeka, koma nsalu yamtunduwu ndi yolimba kwambiri komanso yosalukidwa kwambiri kuposa corduroy yamakono.
Opanga nsalu ku England adapanga corduroy yamakono m'zaka za zana la 18.gwero la dzina la nsaluyi likutsutsanabe, koma n'zokayikitsa kuti chiphunzitso chimodzi chodziwika bwino cha etymological ndi cholondola: Mabuku ena amati mawu oti "corduroy" amachokera ku French corduroy (chingwe cha mfumu) ndi kuti akuluakulu ndi akuluakulu France nthawi zambiri inkavala nsalu iyi, koma palibe mbiri yakale yomwe imatsimikizira izi.
M'malo mwake, n'zosakayikitsa kuti opanga nsalu ku Britain adatenga dzinali kuchokera ku "zingwe za mafumu," zomwe zinalipo kumayambiriro kwa zaka za zana la 19.Ndizothekanso kuti dzinali limachokera ku dzina lachi Britain Corduroy.
Mosasamala kanthu za chifukwa chake nsaluyi imatchedwa "corduroy," idakhala yotchuka kwambiri pakati pa magulu onse a anthu aku Britain m'zaka za m'ma 1700.Komabe, pofika m’zaka za m’ma 1800, velvet inali italowa m’malo mwa corduroy monga nsalu yapamwamba kwambiri imene anthu apamwamba amapeza, ndipo corduroy analandira dzina lotukwana lakuti “velvet ya munthu wosauka.”