In one embodiment, the at least one metal compound may be injected into a perlite expander to form a metal compound coated perlite material.
在一个实施方案中，至少一种金属化合物可以被注入到珍珠岩膨胀器中而形成金属化合物涂布的珍珠岩材料。
In one embodiment, the at least one metal compound may be injected into a perlite expander to form a metal compound coated perlite material.
在一个实施方案中，至少一种金属化合物可以被注入到珍珠岩膨胀器中而形成金属化合物涂布的珍珠岩材料。
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