... 射流的初始段 flow development region 射流的基本段 fully developed flow region 射流扩散角和扩散系数jet speed angle and speed coefficient ...
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磨料水射流的基本段用于工件抛光比较有利。
The basic section of abrasive water jet is more favorable for the workpiece polishing.
实验发现，星形喷嘴射流与普通圆射流相比，其射流初始段较短，但基本段内速度随喷距衰减的速率较低。
It is found that the star_shaped nozzle jet has a shorter initial section and slower velocity attenuation along the jet centerline in the main region than the round nozzle jet.
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