High school mathematics three-dimensional geometric model Junior High School geometric area Volume learning tools 18 sets of students in class problem-solving dual-purpose large teaching aids Model 20 pieces 24-piece cube cuboid
Standard 18-piece set (economical carton packaging) (recommended by the shopkeeper) large plastic suitcase (20 standard geometry 3 additional parts) super large plastic portable case (24 standard
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The student-based education
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Items weight estimation 0 g, subject to actual weight
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