The whole structure of the system is three layer construction, the head connecting into layer, the center application layer and the database support layer of back-end.
系统的整体架构为三层结构，前端接入层、中间应用层和后端数据库支持层。
They are particularly suited to low specific gravity applications where the back-to-back design and center bush provide natural axial balance and additional shaft support.
该类型泵特别适合于低比重介质的工况， 在这种情况下背对背的设计及中间衬套可以产生自然的轴向平衡和附加的轴支撑。
They are particularly suited to low specific gravity applications where the back-to-back design and center bush provide natural axial balance and additional shaft support.
该类型泵特别适合于低比重介质的工况， 在这种情况下背对背的设计及中间衬套可以产生自然的轴向平衡和附加的轴支撑。
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