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Description
It is a calculator circuit board with display. Calculator circuit board had a patient and that patent is a keyboard. The circuit board has a another site that side is better and the IC. It is very useful to our life "The calculator". The calculator display connect to the circuit board by a Ray-Ban.

Description
It is a calculator circuit board with display. Calculator circuit board had a patient and that patent is a keyboard. The circuit board has a another site that side is better and the IC. It is very useful to our life "The calculator". The calculator display connect to the circuit board by a Ray-Ban.