I read of recent developments in waterjet that claimed a breakthrough in speed and accuracy was being attained because they were slightly tilting the water jet to reduce the lag effect of the lower end of the stream. But as far as I know, this was not being carried to the extremes we might call bevelling. There is always the problem of deflection of the stream when hitting a surface at a significant angle. But, who knows, they may have figured out something for that, too.
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