求翻译：一年中大月31天，小月30天，二月平年28天（闰年29天）。本文给出了一种基于数据选择器的自动日历表中月份、日数自动转换的控制电路。是什么意思？

Otsuki 31 days a year, Satsuki 30 days, February average year 28 days (leap year 29 days). In this paper, based on data selector automatic calendar month, the number of days the control circuit automatically converted.

正在翻译，请等待...

In a year odd month 31 days, 29-day lunar month 30 days, in February ordinary year 28 days (leap year 29 days).This article has given one kind based on in the data selector automatic calendar table month of, the date number automaticswitching control circuit.

Odd month 31 days a year, Xiao Yue 30 days February common year 28 days (leap years 29 days). This article gives an automatic calendar based on the data selector table in the month, the number of days automatically converts control circuit.

Odd month 31 days a year, Xiao Yue 30 days February common year 28 days (leap years 29 days). This article gives an automatic calendar based on the data selector table in the month, the number of days automatically converts control circuit.