In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.

[单选题]The position of the interface between oil and water within the centrifuge is achieved by the use of （）.A . gravity discB . centrifugal bowlC . a stack of discsD . main sealing ring

[单选题]The interface between the liquid seal (water) and the oil should be positioned （） possible to the bowl periphery.A . as far asB . as soon asC . as close asD . as closer a

[单选题]The( )is a collection of modules serving as interface between hardware and

[主观题]物理层与层2的接口是『____』。(The interface between physical layer and layer 2 is 『____』.)

[单选题]F．or a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the _______.A．bowl peripheryB．bowl centerC．upper surfaceD．lower surface

[单选题]Sediment collects in a tubular purifier （）.A . on top coverB . on sides of bowlC . in drain line on the discsD . on the disc

[单选题]In a purifier changing to a gravity disc with larger hole diameter will move the interface towards the （）.A . bowl peripheryB . bowl centerC . upper surfaceD . lower surface

[单选题]To ensure oil purifier working in normal condition, the interval between two sludge discharging should not exceed_______hours.A．2B．4C．5D．6

[主观题]what is the use of a purifier ?explain the purpose of a gravity disc ?

[填空题] 接口（interface）是指：（）