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| Access card |
Access products |
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| Taxpayer qualification certificate |
Annual appraisal audit records |
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| Oilfield chemicals license |
Oilfield chemicals license |
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| Oilfield chemicals license |
Product quality approval certificate |
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| Product quality approval certificate |
Product quality approval certificate |
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| China Petrochemical Oilfield Chemicals |
A certificate of members of the network provider |
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| That corporate credit conditions |
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