词汇	three gun tube
释义	three gun tube 三枪管
随便看	departments of defense departments of defense laboratory system departments of economics departments of economy departments of education departments of energy departments of energy intelligence departments of english departments of geomorphology departments of health and human services departments of health education and welfare departments of history departments of housing and urban development departments of justice departments of justice canada departments of labor departments of linguistics departments of local government departments of mathematics departments of medical technologies departments of music departments of philosophy departments of physics departments of psychology departments of scientific fund