etchern.蚀刻师；腐蚀铜版制作者etchv.蚀刻；铭刻；鲜明地描述；流露出etched-out velvet烂花绒etching to frequency腐蚀到所需频率etching waste liquor磷化处理废液etched circuit board蚀刻线路板etcher straightening拉伸矫直etching purification刻蚀提纯etch rinse processor薄片腐蚀 冲洗装置etch pits morphology蚀坑形貌etched microchannels蚀刻(蚀象)微型导管etch resistant layer抗腐蚀层