catalystic hydrogenation of coal tar中文什么意思

• 煤焦油催化加氢

• coal tar:    煤焦油。
• catalyst hydrogenation of coal tar:    煤焦油催化加氢
• coal tar hydrogenation:    煤焦油加氢
• coal-tar hydrogenation:    煤焦油氢化
• hydrogenation of tar:    焦油加氢; 焦油氢化