短语词组短語producer gas coal tar 發生爐煤焦油;繙譯oil gas a tar 石油裂解焦油gas house tar 煤蒸餾副産品gas s tar 煤氣焦油gas works tar pitch 煤氣廠焦油gas works tar 煤氣焦油producer -gas coal tar 發生燈煤瀝青water -gas-tar creosote 水煤氣焦襍酚油 返回 gas tar