For coal blend in which less than 10% lean coal was added, the qualified metallurgy coke can be produced from stamp coke-making.

对于贫煤配加量不超过10%的混合煤料，捣固炼焦后可以生产出合格的冶金焦。

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Customers present the completed Tax Refund forms to the Customs at the airport upon their departure from the above EU countries. The Customs verify and stamp the qualified forms.

离开上述欧盟国家时，客户应在机场海关出示退税单，海关将在符合规定的退税单上加盖海关印章。

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