Dukurikije "Ubushinwa" Gushyira mu bikorwa imikorere yo gutwika ibikoresho n’ibicuruzwa "(GB 8624 - 2012), ibikoresho byo mu cyiciro cya A ntibishobora gutwikwa. Igipimo cyumuriro wibibaho byinyuma biterwa nibikoresho:
. Kurugero, ikirango runaka cyikirahure cya magnesium cyinyuma cyageragejwe nkicyiciro cya A1 (reba: Raporo yigihugu yubaka umuriro utazimya umuriro Raporo yubugenzuzi nubugenzuzi).
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