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1·The block is prepared with pulverized fuel ash, natural silica sand and lime through steaming and pressing with a pressure vessel. In particular, a simulated stone layer 3 is added outside the block.

所说的砌块是由粉煤灰、天然硅沙和白灰经高压容器蒸压而成，特别是在砌块的外层有一层仿石层3。