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full penetration (total intersection) of one surface into other - Intersection is two closed lines
if all lines on one surface intersect the other surface (Fig. 7.16, 7.17);
Figure 7.16
Figure 7.17
.
partial penetration (partial intersection ) of surfaces - Line of intersection is one closed line
(Fig. 7.18). In the case of a partial intersection, on one of the surfaces there are lines not intersecting
the other surface.
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