A.K38+039.518 B.K37+039.518 C.K38+486.278 D.K37+486.278
A.205.315 B.205.308 C.212.031 D.212.024
A.σ鋼=σ鋁,Δl鋼>Δl鋁 B.σ鋼=σ鋁,Δl鋼<Δl鋁 C.σ鋼>σ鋁,Δl鋼>Δl鋁 D.σ鋼<σ鋁,Δl鋼>Δl鋁