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GB/T 1720-2020 English PDF (GBT1720-2020)

GB/T 1720-2020 English PDF (GBT1720-2020)

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GB/T 1720-2020: Circle-drawing test of coating films
This Standard specifies a test method to evaluate the peeling degree of the coating film from the substrate, when the overlapping cycloid diagram penetrates the coating film to the substrate. This Standard applies to the determination of circle-drawing test of a single flat coating film on a hard substrate.

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