防蚀处理：制电版或照相凹版时，作保护金属表面，防止网点或线条被腐蚀的工作。
Staging: Process of covering bare metal, to protect lines or dots from being etched, in making of photoengraving and gravure cylinder.
防蚀处理：制电版或照相凹版时，作保护金属表面，防止网点或线条被腐蚀的工作。
Staging: Process of covering bare metal, to protect lines or dots from being etched, in making of photoengraving and gravure cylinder.
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