單項(xiàng)選擇題

When a clarifier is running the impurities and water collect at the bowl （）.

A.center
B.periphery
C.inlet
D.upper parts

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單項(xiàng)選擇題

A centrifuge arranged to separate impurities and small amounts of water from oil is known as （）.

A.an oily water separator
B.a purifier
C.a centrifugal compressor
D.a clarifier

單項(xiàng)選擇題

A centrifuge arranged to separate two liquids is known as （）.

A.an oily water separator
B.a purifier
C.a centrifugal compressor
D.a clarifier