Igipimo cya Astm a269 ni iki?

Turi uruganda rukora imiyoboro ya ASTM A249 ikoze mu byuma bitagira umugozi, isanzwe ni ASTM A 249 ikoze mu miyoboro, isanzwe ni ASTM A249. Ubuso burabagirana, uburebure ni 4000m/ikoze mu miyoboro, umuyoboro wa ASTM ni woroshye, ushobora gukoreshwa mu gukwirakwiza amavuta, gushyiramo imiyoboro, ibikoresho