back-front vertical plane (Q63861182)
vertical plane orthogonal to the vision axis of the observer and separating his back side (behind him) from his front side (in front of him)
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aliases front-back vertical plane
 rear-front vertical plane
 front-rear vertical plane
description vertical plane orthogonal to the vision axis of the observer and separating his back side (behind him) from his front side (in front of him)