For many years marine centrifuges were designed for （） operation, that is the machines were run for a period during which solids accumulated in the bowlThe machine was stopped when the accumulated solids began to impair its performance.

When a clarifier is running the impurities and water co...

单项选择题When a clarifier is running the impurities and water collect at the bowl （）.

A centrifuge arranged to separate impurities and small ...

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

A centrifuge arranged to separate two liquids is known ...

单项选择题A centrifuge arranged to separate two liquids is known as （）.