Carbonaj卡尔博纳伊carbonn.碳；复写纸；复本；碳精棒carbon mudstone炭质泥岩carbonized brick渗碳耐火砖carbon-contentn.碳含量carbon-covered覆炭Carbon Lock-in碳锁定carbon selection活性炭选型Carbonized resin免疫吸附剂carbon footprintn.碳足迹carbonyl process羰基方法,羰基法carbonless paper无碳复写纸