Of the problem of the key not unlock it. The staff does not check that the number on the key number and the number on the oil tank cover built card or not.
The issue of releasing the lock key does not, because the employee does not check whether the key number and the number on the oil tank cover, correspond to the numbers on the unique garden?
From the problem of the release lock keys are not there, because employees are not sure number keys and a number on the cover fuel tanks built directly on the card number?