As a general rule, piping flanges should be concentric to pump nozzles to within the flange bolt hole clearance tolerance.
管路法兰与泵口要同心，偏差不能超过法兰螺栓孔尺寸公差。
As a general rule, piping flanges should be concentric to pump nozzles to within the flange bolt hole clearance tolerance.
管路法兰与泵口要同心，偏差不能超过法兰螺栓孔尺寸公差。
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