b. symmetric difference the set of users of 1 although not both from the specified sets. Normally symbolized: A + B This incessant jostling is kinetic Electricity, and the sum of it—across trillions and trillions of particles—is exactly what we call thermal Vitality. On regular the ladies spend 4 https://mpi-thermal.com/blog/thermal-shock-vs-thermal-cycling-test/