A pump is defined as device that（）
- Aproduces pressure
- Bimparts energy to a fluid to move it from level ‘A’ to level ‘B’
- Ccreates a vacuum to move a liquid in all installation
- Dis to develop a pressure differential
问题
A pump is defined as device that（）
参考解析：
分类：船舶电气与船舶安全题库
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