Whether the raw material number is correct requires no oxidation, discoloration, moisture, caking and serious segregation.

The factory code of the mold is correct, the marking of the molding surface is consistent with the drawing, and there is no collapse or crack.

Forming burr, powder sticking, edge collapse, leftover meat, powder slag, crack, serious internal and external scratch line, material cutting, mixing, marking position and size.

Sintering furnace spots, oxidation discoloration, carbon deposition, decarbonization, carbonization, black spots, popcorn, skin explosion, bruise, mixing, rust, holes, heavy materials, serious deformation and rust.

Heat treatment furnace spots, whitening, scratches, warping, serious discoloration, mixing

High frequency quenching furnace spots, rust, whitening, scratches, mixing

Steam treatment rust, redness, surface spots, mixing, pimples.

Scratches, damages, collisions, broken materials, cracks, rust, burrs, skin rolling, mixing and needle mixing of plastic inner and outer diameters.

Machining and cutting collapse, pinch, unilateral cutting, burr cutting, few processes, bump, rust, rough tool marks, cracks, chips and mixtures.

The packaging is thrown at the edge of Mao Mao, mixed, rusted and greasy.