hard coal-based pitch的意思|示意
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硬煤基沥青
hard coal-based pitch的网络常见释义
硬煤沥青 ... 硬煤沥青 木炭 压块活性炭[gap=5899]KEY WORDS Datong bitumite, coking coal, 1/3 coking coal, hard coal-based pitch, charcoal, the agglomerated Activated Carbon.