29-09-2005
19
Chemical
Building Materials
385 L.E.
مواصفات الجمعية الأمريكية لاختبار المواد : ASTM C 14 / 1999 Standard Specification for : Concrete Sewer , Storm Drain , and Culvert Pipe . ASTM C 985 / 2000 Standard Specification for : Non - Reinforced Concrete Specified Strength Culvert, Stor
Updated
Not Obligatory
91.100.30