We can get the PTN which wrote the Last Order Entry Date 2021-04-01 and last delivery date 2021-10-01. Why we still can get the newer batch code CZ1480GK(2148+)?
It's a forward looking document, not retrospective one. The planned date might have been extended due to volume, or that the items were tested and packaged at a date after diffusion had completed.
The document specifically identifies several people who you could perhaps query directly.
This is primarily a user to user forum, these types of questions really should be directed to local sales offices or staff with whom you do business.
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