Harbin Longsheng Abacus Factory

[ Manufacturer ]Main business are CHILDREN'S EDGE BEAD ABACUS, STUDENT'S EDGE BEAD ABACUS, ZHUNAOSUAN ABACUS, XINNAOSUAN ABACUS, QINGDANGLENG ABACUS, TEACHING ABACUS, WHITE EDGE-BEAD ABACUS, BROWN EDGE-BEAD ABACUS