Depth gauge: (1)Micrometer for measuring etching depth on plates.(2)Typographical ruler for measuring type body or lin e feed. See Type gauge.是什么意思_Depth gauge: (1)Micrometer for measuring etching depth on plates.(2)Typographical ruler for measuring type body or lin e feed. See Type gauge.在线翻译_英语_读音_用法_例句