The surface roughness of the polished parts RA is not more than 0.8μm, the surface roughness Ra is not 6.3μm, the surface roughness of machined parts RA is not more than 12.5μm.
The lock body surface is not allowed to have a significant impact on the quality of defects.
The key is smooth and smooth, trademark clear, correct.
Corrosion resistance of electrodeposited coatings on exposed surface of metal shall conform to "People's Republic of China Light industry standard spherical door lock QB/T 2476-2000"
The hardness of the organic coated pencil should reach 2H.
The package parts should not affect the appearance.