RS ISO 4259-1: 2017 ISO 4259-1:2017 PETROLEUM AND RELATED PRODUCTS — PRECISION OF MEASUREMENT METHODS AND RESULTS — PART 1: DETERMINATION OF PRECISION DATA IN RELATION TO METHODS OF TEST
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Rwanda Standards
RS ISO 7537: 1997 PETROLEUM PRODUCTS — DETERMINATION OF ACID NUMBER — SEMI-MICRO COLOUR — INDICATOR TITRATION METHOD