求翻译：建造油罐选用的材料和附件,应具有质量合格证明书,当无质量合格证明书或对质量合格证明书有疑问时,应对材料和附件进行复验,合格后方准使用是什么意思？

The construction of tank selection of materials and accessories, should have the quality certificate of compliance, when the quality certificate of compliance or have any questions on the quality certificate of compliance to deal with materials and accessories for reinspection passing behind the pro

tank construction materials used, and accessories, you should have a quality certificate, when no quality certificate or certificate of quality there is doubt about the material, and accessories, check the Use qualified behind

Constructs material and appendix which the oil pot selects, should have the quality qualified certificate, when does not have the quality qualified certificate or has the question to the quality qualified certificate, should to the material and the appendix carries on the re-check, after qualified s

Built tank selection of materials and accessories, they should have quality certificates, when no quality certificate of compliance or certificate of compliance is in doubt on quality, re-inspection of materials and accessories should be, after passing the use

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