Figure 3
Path C (CLIC point to the acetabular center) diagram. (a) Direction diagram of path C, with X as the acetabular center; (b) diagram of length of path and thickness of the ilium at the location of the narrow places, with the distance between e and f as the total length of path, the distance between a and b as the thickness of the first narrow place, and the distance between c and d as the thickness of the second narrow place.