mi2km=1.6093;f=60;ft2km=3.0480e-04;

R_721=[0.2926????0.0673????0.0337?
??????0.0673?????0.2646???0.0673?
??????0.0337????0.0673??0.2926];
??
X_721=[0.1973???-0.0368???-0.0417
????????-0.0368??0.1900???-0.0368
???????-0.0417??-0.0368??0.1973];
???
B_721=[159.7919??0.0000????0.0000
????0????????159.7919????0.0000
????0?????????0?????????159.7919];

L_721=X_721./（mi2km*2*pi*f）;
C_721=B_721*1e-6./（mi2km*2*pi*f）;

R_722=[0.4751?????0.1629????0.1234?
???????0.1629?????0.4488????0.1629?
???????0.1234????0.1629?????0.4751];
??
X_722=[0.2973???0.0326???0.0607
????????0.0326??0.2678???0.0326
???????0.0607??0.0326??0.2973];
???
B_722=[127.8306??0.0000????0.0000
????0????????127.8306????0.0000
????0?????????0?????????127.8306];

L_722=X_722./（mi2km*2*pi*f）;
C_722=B_722*1e-6./