"than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: imported by the US in 2014-12 $341,274,237.00 of HTS Code 8419 ??? nuclear reactors, boilers, machinery and mechanical appliances; parts thereof: machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment" . . . .