A standard receiving area: length ≤5mm scratches, no hand is not exposed primer, or within the range of 100 mm × 100 mm, scratch length <, the number ≤5 3mm not exposed primer, no feel;
A area of the reception standard: scratch length of 5mm, no obvious feel, no primer, or 100 mm x 100 mm range, scratch length of 3 mm, the number of 5 places, do not reveal the primer, no obvious feel;
Acceptance standard of Zone A: scratch length ≤ 5mm, no obvious hand feeling, no primer exposed, or within 100 mm × 100 mm, scratch length < 3mm, number ≤ 5, no primer exposed, no obvious hand feeling;<br>