From this we know that under the influence of the actions of "test damage" and "maintenance", the state of the board is different from that of the passenger.
Therefore, it is known that under the influence of the actions of "test damage" and "maintenance", the state of the board is different from that when the customer returns.<br>
It is known that under the influence of the actions of "test damage" and "maintenance", the state of the board is different from that of the guest when returning.