Specifies the requirements of the LH-29 product, the spin rod, as the basis of the QC inspection. The operation of these requirements which should be standardized and normalized to ensure the quality satisfing customers' demands.
From the height of 81cm, the front, the end and the normal position of the three surface free drop onto the carpet.
From the height of 61cm, as per an angle, three sides, six surfaces to let them fall to the carpeted ground.