Carbonie卡沃涅carbonn.碳；复写纸；复本；碳精棒carbonitride coating碳氮化物涂层carbonation reaction碳化反应carbonyl iron powder羰基法铁粉carbon fiber gridgeo碳纤维格栅carbon nanotube tips碳纳米管针尖carbon potentiometer碳质电位器carbon filter funnel碳质过滤漏斗carbon-sinks ratie碳汇率carbon carrying gold载金炭carbon dioxide cycle[医] 二氧化碳循环