SUDBURY - A showroom was bustling with motion on a recent workday. An engineer was using a machine to put the finishing touches on a fracking gun. In a separate room, training was underway, where customers were learning how to operate and fix machines. Elsewhere, large metal containers were waiting to be shipped, destinations: Arcadia, California, Farmers Branch, Texas, Liberty, Indiana. That work is a part of the technology business unfamiliar to most consumers and it's three minutes away from Town Hall...