Exhibits: Calculator, Lcd Clock, Timer, Stopwatch, Office Supplies.

展品：计算器，电子钟，定时器，秒表，办公用品。

youdao

Exhibits: Calculator, Lcd Clock, Timer, Stopwatch, Office Supplies.

展品：计算器，电子钟，定时器，秒表，办公用品。

youdao