cost
life
track circuiting
fastening
crushed head
angular break
split head
transverse fissures
0.168 cm
-0.168 cm
7.432 cm
7.768 cm
I and 2 are correct
3 and 4 are correct
1 and 4 are correct
2 and 3 are correct
tangent track
sharp curve
tunnels
coastal area