... can be use with most heating method, include flame torch, induction, or furnace, high frequency, electrical resistance welding, and so on. ... valve, compressors for air condition, gas heat water heater, stainless vacuum cups, motor, wiring, cut tool, glasses etc.FB102C-21650 – ... steel and copper. Current application is brazingrefrigerator tube, glasses, vacuum cups, hydrant, valve, hardware and so on.