the teaching aid, wood triangles , one side is 50cm or longer , Divided in cm and mm,With a handle in mid 1)wood triangles2)one side: 50 cm or longer3)Divided in cm and mm4)With a handle in mid5)fob china price:?6)moq:1000pcs7)pcs/cbm:?8)delivery:?9)payment: ? trigonometry
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