In an oily water separator the oil will travel （） to the oil collecting spaces.

For a purifier changing to a gravity disc with smaller ...

单项选择题For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the（）.

For a purifier, changing to a gravity disc with larger ...

单项选择题For a purifier, changing to a gravity disc with larger hole diameter will move the interface towards the （）.

For many years marine centrifuges were designed for （） ...

单项选择题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.