long quality guarantee period
... establish a guarantee period 规定保修期 long quality guarantee period 保质期长 during the guarantee period 在保修期间 ...
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long quality guarantee period
质量保证期长
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The introduction of compound fresh-preserving agent can prolong the quality guarantee period of the products. But now the reasonable dosage in brine has long been where the key question lies.
引入复合保鲜剂可以延长产品的保质期，但卤煮过程中，其合理用量一直成为瓶颈问题。
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