PG 58-22Hamid_faradOctober 16, 2020قیر PG 58-22 یک قیر عملکردی است ،این قیر که بر اساس عملکرد آن در دماهای مختلف درجه بندی می ... Read More
PG 58-22Hamid_faradOctober 16, 2020Bitumen PG 58-22 is Performance Grade (PG) Bitumen is bitumen which is graded based on its performance at different temperatures. ... Read More