The production of nab50a was suspended due to the abnormal transportation of raw carbon black in the production years ago. Today, the production can be stable after the improvement of transportation mode. However, it is found that the particle appearance is poor and the production process cannot be completely restored to normal through multiple adjustments. Therefore, through discussion with relevant departments such as business and technology, it is jointly decided to continuously produce the product as a special product; See Annex - minutes of meeting for details.
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