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Various quality tests are conducted on Douai . The whole body structure goes through the temperature and water spray tests, and its cells parts are required to be tested in terms of purity, crystal orientation, and resistivity.

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In order to meet the standards of the heatsink industry, Douai has to go through a strict inspection process conducted by precise inspection equipment.

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Douai has to go through a series of professional production stages including material selection, quality inspection, the initial product test before it goes to the gift shops.

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The electrode materials of Douai are carefully delivered to the factory in the form of black powder that is almost indistinguishable.

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Each raw material to be used for Douai will be thoroughly inspected for any lumps, molds, cracks, blemishes and other pre-production anomalies that could take place.

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The quality control of Douai is strictly conducted by our QC team to comply with the regulations of the storage battery industry, including metallic elements procurement.

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excels similar products due to its .

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