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What are the positions of upper and lower molds in an auto parts company?

He is an upper and lower die technician. The job content is:

1. Responsible for the upper and lower molds of the injection molding machine according to the production order.

2. Routine inspection and maintenance of molds. Auto Parts Co., Ltd., established in 2015 and located in the Hong Kong Special Administrative Region, is an enterprise mainly engaged in organizations that cannot be classified.