DF4B型内燃机车流经燃油预热器的冷却水靠()输送。A、预热水泵B、高温水泵C、低温水泵D、自然水压差
DF4B型内燃机车流经燃油预热器的冷却水靠()输送。
- A、预热水泵
- B、高温水泵
- C、低温水泵
- D、自然水压差
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