英文說明:Earthen brick molds were used in the manufacture of building materials. There were two types: one had walls made of brass plates over a wooden frame, so that the finished brick would not be trapped by the wooden slats, but would come out of the mold smoothly. The other type of mold was made of a movable wooden frame. When the brick was finished, the frame was dismantled and the finished brick removed. These two molds are both complete. There is also a bamboo shovel used in brick manufacture. Earthen bricks were a major source of building materials for homes.