1、A method of offset printing using photomechanical plates.
照相平版膠印法利用照相制版膠印的方法

2、A method of offset printing using photomechanical plates
照相平版膠印法利用照相制版膠印的方法

3、Any of various photomechanical or photoengraving methods.
照相制版術(shù)照相工藝或照相制版的方法

photomechanical翻譯