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| Middle hole of volcanic rock |
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Health; environmental protection, natural, classical, simple |
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Wear-resistant, acid, high temperature |
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Light weight, high strength, insulation, heat insulation, sound-absorbing, fire, and pollution-free, |
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non-radioactive and so on, is an ideal natural green, |
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environmentally-friendly energy-efficient building materials |
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Pore size
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minimum order
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