Slot reamer plate adopt four reamers synchronization, save exchange board time.
开槽刀盘采用四刀同步，节省换单时间；
After the run, an inspection of the reamer blades showed good performance and little wear.
起出后检查扩眼器的刀片，发现性能良好，磨损很小。
After the run, an inspection of the reamer blades showed good performance and little wear.
起出后检查扩眼器的刀片，发现性能良好，磨损很小。
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