Tam sim no, cov dej khib nyiab COD tshaj li tus qauv feem ntau suav nrog electroplating, Circuit Court board, papermaking, tshuaj, textile, luam ntawv thiab dyeing, tshuaj thiab lwm yam dej khib nyiab, yog li dab tsi yog txoj kev kho rau COD dej khib nyiab? Wb mus saib ua ke. Cov dej khib nyiab CO...
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