English to Italian Tech/Engineering Engineering (general)

Come tradurreste "traversing counter-clockwise to a face"? Non so come tradurre quel "to a face".

Qui sotto compare 3 volte:

"Three left-handed helical paths can be provided, each one commencing with an oppositely oriented surface similar to the surfaces 152 and traversing counter-clockwise to a face 218A below and on the arm 128 immediately counter-clockwise of the oppositely oriented surface, then to the face 218B on the next arm 128 and then to the face 218C on the next arm 128."


Grazie!