pitch circle /SCIENCE,ENG-MECHANICAL/
[DE] Rollkreis; Waelzkreis
[EN] pitch circle
[FR] cercle roulant; roulante circulaire
pitch circle,pitch line,primitive circle /TECH,ENG-MECHANICAL/
[DE] Teilkreis
[EN] pitch circle; pitch line; primitive circle
[FR] cercle primitif; primitif
US:operating pitch circle,pitch circle /ENG-MECHANICAL/
[DE] Waelzkreis
[EN] US:operating pitch circle; pitch circle
[FR] cercle primitif de fonctionnement