ซึ่งสามารถสมมุติฐานได้ว่า carboard ที่นำมาทำการdrop testน่าจะมีปัญหามาจากที่โรงงาน
Testing from trays of TWB10 by drop test were unacceptable because control was many broken where the trays were same carboard. which can assume that the cardboard was drop test. there was a problem from the factory.So it's better for us to check again.