【机械工程】进 出 风 扇 的 冷 却 空 气 风 扇 ，（ 鼓 风 机） 内 燃 机

cooling-air guide

delivery of cooling-air by means of exhaust gas(waste gas)

arrangement of cooling-air pumps engine

arrangement of cooling-air pumps

drive of cooling-air pumps

guiding cooling-air to and from heat exchanger in combustion engines

cooling-air duct for cylinders in engines

cooling-air circulation