求翻译：凡用户自备包装容器，装运公司产品后，销售部在质量合格证、发票或销售合同上同时注明“本产品符合标准。用户自备容器，质量以大罐（或批）封样为准。当发生质量争议时，以质检部门留样为准”。是什么意思？

All user-owned containers, shipping products, the sales department in the quality certificate, invoice or sales contract at the same time marked "This product meets the standard. User-owned vessel, the quality of a large pot (or batch) sealed samples shall prevail When the quality of dispute occur,

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Quality department each month must carry on the spot-check to the tank car quality, the spot-check result integrates the company achievements inspection.

Where users bring their own containers, shipping product, sales in the quality certificate, the invoice or on the sales contract and indicating "this product conforms to the standards. User-owned container, quality in large tanks (or batch) for reference only. When the quality dispute, is subject to

Where users bring their own containers, shipping product, sales in the quality certificate, the invoice or on the sales contract and indicating "this product conforms to the standards. User-owned container, quality in large tanks (or batch) for reference only. When the quality dispute, is subject to