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See Chinese contents: GB/T 1731-2020 GB/T 1731-2020: Determination of flexibility of coating and putty films
This Standard specifies the determination of flexibility of coating and putty films by a flexibility tester. Use the smallest spindle diameter that does not cause damage to the coating and putty films to represent the flexibility of the coating and putty films. This Standard applies to the determination of flexibility of coating and putty films.
