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2.
Porcelain stone exploited from a mine is changea into brick - form mud block , through the processes of water - ramming , washing , decontaminating , and depositing . then , the mud bolck is treated with water for farther decontaminating , and is twisted with hand or treaded with feet for squeezing air out of the blocks and for distributing water content well in the block 从矿区采取瓷石，经水碓春细，淘洗，除去杂质，沉淀后制成砖状的泥块。然后再用水调和泥块，去掉渣质，用双手搓揉，或用脚踩踏，把泥团中的空气挤压出来，并使泥中的水分均匀。
