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新型墻體材料模具采用什么材料,,模具壽命大概多少萬次,? |
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點評
為了環(huán)保,,國家逐步淘汰粘土燒結(jié)的紅磚。采用煤矸石,、粉煤灰,、頁巖等材料用模具成型后燒結(jié)而成的空心磚等
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