... 4:Capacity: 580000-600000pcs chalk machine from china (0086-15824832376) 1. Introduction of the dustless chalk machine/manual chalk machineThis ... or more, the product rate increased from the original 50% to 99%, and greatly improve the product quality, the output of the chalk bright and ... mold teams, the launch in 800, one-time the mold. Chalk shape are round, square type, type and set DuoZhong, thick, ...