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4.4.5 Product finish page
Product finish page
When product is finished, the product finish page will
be displayed, and after a few seconds, it will return to
sale page automatically
4.4.6 Error page
Error page
Machine error
，
Product sold out
（
lack water or
powder
），
No network
，
Door unclosed
，
any of
these four states ,the interface will enter error page,
and will report to server
