根据标签上的生产日期及生产批号展开调查，该产品当天由7#生产，查该机当

According to the production date and production batch number on the label, the product is produced by 7# on the same day. Check the production record of the machine on the same day. There is no 100UF16V product in the front and back batches. Therefore, the same batch of products on the same machine is attached to the previous batch of products. The reason for the label can be ruled out.

According to the production date on the label and the production lot number to investigate, the product on the same day by 7 , check the production record of the machine on the same day, before and after the batch are not produced 100UF16V products, so the same machine after the batch of products labeled before the reasons can be excluded.

According to the production date and batch number on the label, the product was produced by 7 × 7 on the same day. According to the production record of the machine on the same day, no 100uf16v product was produced in the previous and subsequent batches. Therefore, the reason for labeling the previous batch of products in the same machine can be excluded.