短语词组短语low sulfur expansible graphite 低硫可膨胀石墨的superfine expansible graphite 超细可膨胀石墨micron expansible graphite 微米级可膨胀石墨Fine powder of expansible graphite 可膨胀微粉石墨sulfur -free expansible graphite 无硫可膨胀石墨 返回 expansible graphite