The original language of your patent is Chinese and
veneer used in this way and context only seems to be found in translations from Chinese. As far as I can tell, it appears to be a mis-translation for
single board or just
board depending on the precise context.
Here is one example:
Method and device for switching main veneers and standby veneers (CN)
METHOD AND APPARATUS FOR SWITCHING THE MAIN/STANDBY SINGLE BOARD (EP/WO/US)
The present invention discloses a method and apparatus for switching an active board and a standby board
https://worldwide.espacenet.com/publicationDetails/inpadocPa...