Which of the following pumps is used where a relatively high pressure and small capacity are required?（）<br>A:Volute pump<br>B:Diffuser pump<br>C:Regenerative pump<br>D:All of the above

Which of the following pumps is used where a relatively high pressure and small capacity are required?（）
A:Volute pump
B:Diffuser pump
C:Regenerative pump
D:All of the above

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