單項(xiàng)選擇題

Before the sludge in a purifier is ejected,（）

A.the oil feeding is stopped and replaced by admitting flushing water
B.the flushing water feeding is stopped and replaced by admitting oil
C.the feeding of dirty oil and flushing water is stopped
D.the feeding of dirty oil and flushing water is admitted

你可能感興趣的試題

單項(xiàng)選擇題

A centrifuge of which the bowl is arranged as the upper and lower parts separate discharges the sludge（）

A.by opening the separator manually
B.by separating the lower part from the upper part automatically
C.by separating the upper part from the lower part automatically
D.continuously

單項(xiàng)選擇題

“A centrifuge consists of an electric motor driving a vertical shaft on the top of which is mounted the bowl assembly”.According to this sentence, we can know that is mounted on the top of the vertical shaft（）

A.a centrifuge
B.an electric motor
C.a bowl assembly
D.a driving motor

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Before the sludge in a purifier is ejected,（）

你可能感興趣的試題

A centrifuge of which the bowl is arranged as the upper and lower parts separate discharges the sludge（）

“A centrifuge consists of an electric motor driving a vertical shaft on the top of which is mounted the bowl assembly”.According to this sentence, we can know that is mounted on the top of the vertical shaft（）