Previously, we have attached a way to find out the cause of the problem and the source of the problem to the customer every time, but they are not the เมื่ themselves were asking us to cancel this section need only give us a summary of past that the cause of the problem comes from nothing. However, in the future we will attach to the how to find the cause of the problem and the source of the problem to the customer. The real reason is summarized into a form 8 D report based on the customers.
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