sives or polishing products, other than gear cutting, gear grinding or gear finishing machines of heading 8461: other grinding machines, in which the positioning in any one axis can be set up to an accuracy of at least 0.01 mm: numerically controlled: exported by the US in 2009-11 $9,865,437.00 of HTS Code 8460.21.00 ??? nuclear reactors, boilers, machinery and mechanical appliances; parts thereof