1, material requirements: according to customer specifications and identification of samples, no errors are allowed.

        2, size test: use calipers or projectors to measure the key, important size and assembly size of the product to meet the standard and design

        3, water level: white ∮ ≤ 3mm, poor water hole perforation, nozzle height ≤ 0.5mm

        4, hinge: no more glue, lack of glue, damage, deformation, deformation, cloak, repeated upper and lower cover, the switch is closed naturally smooth, the hinge is not easy to trip

        5, support feet: no damage, lack of glue, dirty

        6, clearance: upper and lower cover closing gap ≤1.0mm, misalignment gap ≤0.3mm, upper and lower cover contact surface edge, no visible scratching, flanging

        7, thimble printing: protrusion ≤ 0.5mm (does not affect the assembly), sagging ≤ 0.3mm (no external vertices)

        8, internal frame structure: internal / external structure, size / position, consistent with the sample

        9, edge requirements: according to customer requirements to trim the size of the position, the allowable error +/- 2MM. The Quartet cannot give in. In the case where the high frequency products are in an edge state, they can be received by the glitch according to the requirements of the customer.