董氏无刻蚀镀铁工艺
Dong’s Iron Plating Technique
董氏无刻蚀镀铁技术
Dong’s Iron Plating Technology
无刻蚀
with no need of etching technology
Isolongifolol
无刻蚀镀铁
free Fe electroplating
Iron plating without anodic etching
iron plating without pre-etching
酯胶无光调合漆
ester gum ready mixed paint-matt