题目内容
In an automobile engine,heat flows or transfers from the iron or aluminum cylinder to the cooling water,and from the coolant to the copper or aluminum ______ .
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In an automobile engine, heat flows or transfer from the iron or aluminum cylinder to the______, and from the coolant to the copper or aluminum radiator.
The coolant gets hot______ it goes through the engine.
The ______of the lubricating system is to supply all moving parts inside the engine with lubricating oil.
______ is a mixture of water, oil, dirt and other products of combustion.
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