Etche埃奇etchv.蚀刻；铭刻；鲜明地描述；流露出etch pits method腐蚀坑法etching industry坊刻业etch pit density腐蚀坑密度Etching velocity腐蚀速度etch-resistantadj.抗蚀的etching reaction侵蚀反应etched ion track离子径迹刻蚀etching circuits蚀刻线路etching duration酸蚀时间etching kinetics腐蚀运动学