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GB/T 20928-2020 English PDF (GBT20928-2020)

GB/T 20928-2020 English PDF (GBT20928-2020)

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GB/T 20928-2020: Seamless inner grooved copper tube
This Standard specifies the classification and labeling, technical requirements, test methods, inspection rules, marking, packing, transporting, storing and quality certificate, and order form (or contract) content of seamless inner grooved copper tube. This Standard applies to seamless inner grooved copper tube for air conditioning and refrigeration equipment.

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