TT4D

tt4dTOUGH GUN TT4A Reamer Power Through Weld Spatter for Increased Uptime and Weld Quality. The TOUGH GUN® TT4A reamer is a robotic nozzle cleaning solution that maximizesTechnology Transfer for Defense (TT4D) at Stanford University specializes in matching Defense Department funding with academic research projects. In the past six years, TT4D has worked