The formula for calculating circumference of circle of circle of surface area is deduced by the deduction of the Circular Demographic Park of rectangular model primary geometric calculation model

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  • Item#:611821714275
  • Location:China
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Brands:
Su Xiao
Model:
Circular Rate Demographer
Color Classification:
(No printed word) (printed) (magnetic printed)
Production Enterprises:
Taizhou Jinsong Teaching Instrument Co., Ltd.
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