RS ASTM C311/C311M-22 STANDARD TEST METHODS FOR SAMPLING AND TESTING FLY ASH OR NATURAL POZZOLANS FOR USE IN PORTLAND-CEMENT CONCRETE
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Rwanda Standards
RS ASTM D3227-16 STANDARD TEST METHOD FOR (THIOL MERCAPTAN) SULFUR IN GASOLINE, KEROSINE, AVIATION TURBINE, AND DISTILLATE FUELS (POTENTIOMETRIC METHOD)