求翻译：产品的等级和质量：产品的等级和质量，国家有关部门有明确规定的，按规定标准确定产品的等级和质量；国家有关部门无明文规定的，由双方当事人协商确定。）是什么意思？

The level and quality of the product: the product grade and quality, the state authorities are clearly defined, according to the standard to determine the level and quality of the product; the relevant state departments expressly provided to be negotiated by the parties. )

The level and quality product: the product of the level and quality, the State departments concerned with a clearly defined, in accordance with criteria to determine the level and quality products; no explicit State departments, by the determined in consultation between the parties. )

Product rank and quality: The product rank and the quality, National Department concerned has the explicit stipulation, according to stipulation standard determination product rank and quality; The National Department concerned non-regulations, consults the determination by the both parties.）

The level and quality of the product: the product grading and quality, relevant State departments have clearly defined, criteria to determine the level and quality of the product, as required; national authorities no provision, negotiated by the parties. ）

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