Anodizing
Black Oxide
zinc plating
Gold plating
Chromes
about
team
BLACK OXIDE (BLACKENING ) ON STEEL
钢鉄发黑
Black oxide (Blackening ) on steel –MIL-DETL -13924D
钢鉄发黑 – MIL-DTL-13924D
Black oxide (Blackening ) on steel –MIL-DETL -13924D
钢鉄发黑 – MIL-DTL-13924D
