A.1mm,1KN B.2mm,1KN C.1mm,2KN D.2mm,2KN
A.5,5 B.5,10 C.10,10 D.10,5
A.0.2m*0.2m B.0.3m*0.3m C.0.4m*0.4m D.0.5m*0.5m