Dow etching a powerless etching technique for letter-press plates invented by Dow Chemical Corporation.

陶氏腐法陶氏化学公司发明的一种无粉腐技巧。用来制造活版印版。

youdao

Dow etching a powerless etching technique for letter-press plates invented by Dow Chemical Corporation.

陶氏腐法陶氏化学公司发明的一种无粉腐技巧。用来制造活版印版。

youdao