淡水膨胀箱 meaning in English

fresh water expansion tank

The cooling water system of main , auxiliary engine are all closed - type cooling , their cooling water piping are arranged separately
主机冷却水系统由调温器、淡水冷却器、滑油冷却器、淡水泵、海水泵、淡水箱（兼淡水膨胀箱）组成。
Main engine cooling water system include thermoregulator , fresh water cooler , lub oil cooler , fresh water pump , sea water pump , fresh water tank ( also used as fresh water expansion tank )
主机冷却水系统由调温器、淡水冷却器、滑油冷却器、淡水泵、海水泵、淡水箱（兼淡水膨胀箱）组成。