由双方签署的合同产品考核验收合格证书一式两份。

Certificate of acceptance of contract product quality signed by both parties in two copies.

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计量器具应附带主管部门检定合格的有效证件，验收时应核对规格、数量、外观及合格证书。

There should be attached with effective certificates issued by supervision sectors. The specifications, quantity, appearance and conforming certificates should be checked in the acceptance check.

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