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See Chinese contents: GB/T 21910-2017 GB/T 21910-2017: Method for measuring relative wet grip performance of passenger car tyres
This Standard specifies the method for measuring relative wet grip braking performance index to a reference under loaded conditions for new tyres for use on passenger cars on a wet-paved surface. This Standard uses the test method comparing with standard reference candidate tyres. This Standard applies to new passenger car tyres.
