Resistance welding - Welding current measurement for resistance welding - Part 4: Calibration system (ISO 17657-4:2005); German version EN ISO 17657-4:2007— 28 стр.
Resistance welding - Welding current measurement for resistance welding - Part 3: Current sensing coil (ISO 17657-3:2005); German version EN ISO 17657-3:2007— 22 стр.
Resistance welding - Welding current measurement for resistance welding - Part 3: Current sensing coil (ISO 17657-3:2005); German version EN ISO 17657-3:2007— 22 стр.