1101
concrete_bridge Bridge beam_bridge girder_bridge viaduct arch_bridge fixed_link
00
jspark2418
2
0o00o00o00o00o0
3
4
o
1
o0
o0o0
oo0
0
0o0o0o0o0o0000000000o00000000000000000000000oooooooooo000000
oo0o
000