The old structure is remained for underground parking and the new designs are embedded into the original basement so as to be concreted with the existing framework structure . As to the overground space covered by the vault-umbrella , the walls and the ceiling feature as-cast-finish concrete surface so that their geometrical dividing line seems faint.
22.
Figure 29 shows the boron framework structure of0Sc 3.67 x B 41.4 y z C 0.67 + z Si 0.33 w viewed along the " c "-axis, where the pillar-like units P1 and P2 are colored in dark green and light green respectively and are bridged by yellow icosahedra I4 and I7.
