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perpetual calendar的英文翻译是什么意思，词典释义与在线翻译：
英英释义
Noun:
-
a chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years
perpetual calendar的用法和样例：
例句
- Products are mainly used in computer motherboards, calculator, calendar, watches, cameras, cordless phones and so on.
产品主要应用于电脑主机板，计算器，万年历，手表，照相机，无绳电话等。
