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bitumen
Bitumen Penetration Grade 60/70, Bitumen Penetration Grade 40/50 Bitumen Penetration Grade 80/100, Bitumen Penetration Grade 20/30 Bitumen Penetration Grade 6/12, Bitumen Penetration Grade 30/40 Bitumen Penetration Grade 10/20, Bitumen Penetration Grade 100/120