... breeching 烟道 burn-proof insulation 防烫保温 butadiene 丁二烯 ...
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All building materials made from expanded vermiculite is burn-resisting, heat insulation, sound proof. It is also process simple with low cost.
用膨胀蛭石制成的各类建筑材料不仅耐燃、隔热、隔音，而且生产工艺简单，成本低廉。
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