reserve J,J1,K for Element of Segm 13,
  b,b1,b2,c,c1,c2 for Element of SCM+FSA-Data-Loc,
  f,f1,f2 for Element of SCM+FSA-Data*-Loc;

theorem Th1:
  IC SCM+FSA = NAT by SCMFSA_1:5,SUBSET_1:def 8;
