求翻译：旋转水射流是指在喷嘴不旋转的条件下产生的射流具有三维速度的、射流质点沿螺旋线轨迹运动而形成的扩散式射流。磨料射流（Abrasive Jet）是在水射流束中引入了磨料颗粒而形成的射流。进行旋转锥形磨料射流喷头的流体受力理论分析及结构参数的研究有利于改善喷头的机构增强射流的性能，具有重要的理论价值。是什么意思？

The rotating water jet diffusion jet jet with three-dimensional velocity in the nozzle does not rotate under the conditions of the jet particle formation along the spiral trajectory. The abrasive water jet the (abrasive Jet) is the introduction of abrasive particles in the water jet beam formed jet.

Rotating water jets in the nozzle that is does not rotate the conditions under which the jets have a 3-d velocity of the stream, quality points along the spiral track of proliferation-jet. Abrasive jet (Abrasive Jet) is in the water jet beam has been introduced in a abrasive particles and the jets.