Back planning: Finishing operation to the back of a stereotype or an electrotype after backing up to make it smooth and to the required height.
平背:铅
版或
版在背后所需
平和达致标准
工作。
版，版印刷物版；制版Back planning: Finishing operation to the back of a stereotype or an electrotype after backing up to make it smooth and to the required height.
平背:铅版或版在背后所需平和达致标准工作。
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