Do you know some knowledge about calculators? Today, the editor of function scientific calculator For sale will take you to a simple understanding.
The new calculator includes a body, a groove is arranged on the side of the body away from the keys, and a drawer is arranged in the groove, and paper and pen are placed in the groove; a rectangular groove is arranged on the upper part of the surface display screen of the body , and the upper shaft of the groove is connected to the sliding door, and the inner surface of the sliding door is provided with a light tube, and the light tube is connected with the battery and the switch in series. When people use the calculator, take it out and use it; the light tube at the bottom of the grooved sliding door on the surface of the body is convenient for people to use the calculator in low light conditions.

The above is the small series of function scientific calculator For sale: a brief introduction to some knowledge about calculators.