step-by-step excitation step-by-step feed step-by-step method step-by-step regulator step-by-step switch step-by-step test step-by-step welding step change step cone step connection step connexion step counter step counterbore step down step-down transformer step drill step function step grate step grind stephanite |
step-by-step excitation елн. стъпално възбуждане Търсената дума е намерена |