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NEN ISO 4548-9 : 1995
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METHODS OF TEST FOR FULL-FLOW LUBRICATION OIL FILTERS FOR INTERNAL COMBUSTION ENGINES - PART 9: INLET AND OUTLET ANTI-DRAIN VALVE TESTS
Published date
12-01-2013
Publisher
Specifies methods of measuring the effectiveness of either inlet or outlet anti-drain valves if fitted to a full-flow lubricating oil filter of the 'spin-on' or 'easy change' type, for internal combustion engines.
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