例如，“urn：epc：id：sgtin：1234567.654321.999”，其中的“1234567”是生产商标识符，“654321”是产品类，“999”是序列号。
An example epc is "urn: epc: id: sgtin: 1234567.654321.999", where "1234567" is a manufacturer identifier, "654321" is a product class, and "999" is a serial number.
例如，“urn：epc：id：sgtin：1234567.654321.999”，其中的“1234567”是生产商标识符，“654321”是产品类，“999”是序列号。
An example epc is "urn: epc: id: sgtin: 1234567.654321.999", where "1234567" is a manufacturer identifier, "654321" is a product class, and "999" is a serial number.
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