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Tired of doing boring strokes on your stiff calculator keys?
Still want to review the wonderful feeling when we can write
Formula drafts on the notebooks as our wish?
This is a special calculator with an electronic touch screen.
It imitates the process of doing paper calculating and abandons
the traditional calculator mode. Combining original operating
with modern scientific techniques offers your calculating work
grand new fun!
Liusimin Chentaohao Guzheming Shenyang Liululu