Are we talking the cool crystal selection spirals like RR et al use to make monocrystaline turbine blades? https://www.americanscientist.org/article/each-blade-

Are we talking the cool crystal selection spirals like RR et al use to make monocrystaline turbine blades? https://www.americanscientist.org/article/each-blade-a-single-crystal https://www.americanscientist.org/article/each-blade-a-singl...