Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals（）<br>A:an injection process<br>B:an ejection process<br>C:a separation process<br>D:a heating process

Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals（）
A:an injection process
B:an ejection process
C:a separation process
D:a heating process

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