The volute pump is one in which the impeller （）.<br>A:discharges into a gradually widening channel<br>B:has stationary diffuser vanes<br>C:produces no kinetic energy<br>D:All of the above are true

The volute pump is one in which the impeller （）.
A:discharges into a gradually widening channel
B:has stationary diffuser vanes
C:produces no kinetic energy
D:All of the above are true

出自：海船船员证

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