A.2.0mH2O B.0.2mH2O C.-8mH2O D.-2mH2O
A.101.3kN/m2 B.98.0kN/m2 C.9.8kN/m2 D.10.13kN/m2
A.1kN/m2 B.2kN/m2 C.5kN/m2 D.10kN/m2