Novel mathematical tool places box

Novel mathematical tool places box, including chi board box, stationery box, chi board box rear portion symmetric distribution slider, the spacing platform of chi board box lower part symmetric distribution, spacing platform outside has receiving surface, and chi board box top has the connection roof, has no. One the catching groove inside the connection roof, stationery box rear portion symmetricdistribution slider groove, the stationery box is inside to have the spacing groove, the symmetric distribution laminating surface of limiting groove portion, the stationery box top has stationary roof, and stationary roof inside has the catching groove no. Two, and the slider slides in the slider inslot, and limiting groove is put into to spacing platform, laminating surface and receiving surface cooperation, chi board box rear portion has chi board box body, and the inside evenly distributed of chi board box body places the chamber, and the ruler is put into with the set -square and is placed the intracavity. 新型数学用