Amerika Uruzitiro rw'agateganyo

Uruzitiro rusanzwe rwo kubaka muri Amerika ni inzitizi ya moderi, yimurwa ikoreshwa mu gihugu hose muri Amerika. Yujuje ubuziranenge bwa ASTM kandi ikozwe muburyo bwo guhangana nikirere cy’ikirere muri Amerika, nko gutera umunyu ku nkombe, ubushyuhe bukabije bwo mu majyepfo, n’umuyaga mwinshi wongeyeho imvura y'amahindu mu burengerazuba bwo hagati. Byakoreshejwe cyane mubwubatsi